NCERT Grade 9 Economics Chapter 8: Problem of Choice Solutions (Part 1)

Quick Facts

Chapter Name

Building Blocks in Economics: The Problem of Choice

Subject

Social Science (Economics)

Grade

NCERT Grade 9

Main Theme

Economics explains how individuals, businesses, and governments make choices because resources are limited but human wants are unlimited. Every choice involves giving up another alternative, known as Opportunity Cost.

Important Points

✔ Human wants are unlimited.

✔ Resources are scarce.

✔ Every economic decision involves a choice.

✔ Opportunity Cost is the value of the next best alternative sacrificed.

✔ Economics helps in efficient use of scarce resources.

✔ Producers, consumers, enterprises and governments all make economic decisions.

Story

The Story of Riya’s ₹500

Riya received ₹500 from her parents as a reward for scoring good marks.

She wanted to buy

  • A Novel
  • Bluetooth Earphones
  • A School Bag
  • Save Money

But she had only ₹500.

After thinking carefully, she bought the school bag because her old bag was torn.

She postponed buying the earphones.

Here,

Choice Made
➡ Buy School Bag

Opportunity Cost
➡ Bluetooth Earphones

This simple situation explains one of the most important ideas in Economics—

Whenever we choose one option, we sacrifice another option.

That sacrificed option is called Opportunity Cost.

Key Terms

Term Meaning
Economics Study of how limited resources satisfy unlimited wants
Need Something essential for survival
Want Something desirable but not necessary
Scarcity Limited availability of resources
Choice Selecting one alternative from many
Opportunity Cost Value of the next best alternative given up
Resource Anything used to produce goods and services
Market Place where buying and selling takes place
Economy System of production, consumption and distribution
Producer Person or firm producing goods
Consumer Person using goods and services
Enterprise Organization producing goods or services

These definitions align with the chapter’s explanations of needs, wants, resources, markets, economic entities and opportunity cost.

Memory Tricks

1. Four Factors of Production

LLCT

L → Land

L → Labour

C → Capital

T → Technology

Easy to remember

LLCT = Let’s Learn Cleverly Together

2. Unlimited Wants

Remember

N → Need

W → Want

Needs first

Wants later

3. Economics Formula

Questions & Step-by-Step Solutions

Question 1

Why do you think people’s wants keep changing over time? How does this affect production in an economy? Why cannot all our wants be satisfied?

Step 1: Understanding Human Wants

Human wants are unlimited.

As people grow older, earn more income, learn about new products, or experience changes in lifestyle and technology, their wants also change.

For example

Child

↓

Toy

Teenager

↓

Laptop

Adult

↓

Car

Senior Citizen

↓

Healthcare

Thus, wants are never fixed.

Step 2: Why Wants Keep Changing

Several factors influence changing wants.

Income

Higher income increases purchasing power.

Example

A family buying a motorcycle may later wish to buy a car.

Technology

New inventions create new wants.

Example

Earlier

DVD Player

Now

Smart TV

Fashion

Changing fashion trends create new demands.

Example

Clothing styles change every season.

Education

Education increases awareness about better products and services.

Lifestyle

Urban lifestyles create demand for modern gadgets, fitness equipment and online services.

Step 3: Effect on Production

Because consumer wants keep changing,

Producers must

✔ Produce new goods

✔ Improve quality

✔ Introduce innovation

✔ Study market demand

✔ Use better technology

Example

When smartphones became popular,

many companies stopped producing keypad phones.

Thus production changes according to consumer demand.

Step 4: Why Cannot All Wants Be Satisfied?

Resources are limited.

Examples include

  • Land
  • Labour
  • Capital
  • Water
  • Minerals
  • Time

Since resources are scarce, it is impossible to satisfy unlimited human wants completely.

People must therefore make choices and accept an opportunity cost.

Flowchart

Final Answer

People’s wants change because of changes in income, technology, education, fashion and lifestyle. These changing wants encourage producers to manufacture new and better products. However, since resources such as land, labour, capital and time are limited, it is impossible to satisfy every human want. Therefore, every individual, business and government must make choices while using available resources. This reflects the chapter’s core idea that unlimited wants must be managed through efficient use of limited resources.

Question 2

‘Human wants are unlimited and keep changing.’ How do you think this constant desire for more creates pressure on the environment? Can the fulfilment of wants and the extraction of resources be balanced?

Step 1: Understanding the Problem

People continuously demand

  • More food
  • More clothes
  • More vehicles
  • Bigger houses
  • More electronic gadgets

To satisfy these wants,

industries extract more natural resources.

Step 2: Environmental Pressure

Excessive production leads to

Deforestation

Trees are cut for industries and housing.

Water Depletion

Factories and agriculture consume huge quantities of water.

Air Pollution

Factories and vehicles release harmful gases.

Soil Degradation

Overuse of fertilizers and mining damage fertile land.

Climate Change

Burning fossil fuels increases greenhouse gases.

Step 3: Can Balance Be Achieved?

Yes.

Sustainable development allows present needs to be met without harming future generations.

This can be achieved through

✔ Recycling

✔ Renewable Energy

✔ Rainwater Harvesting

✔ Sustainable Farming

✔ Forest Conservation

✔ Public Transport

✔ Responsible Consumption

Example

Instead of buying a new mobile phone every year,

people can

  • repair it,
  • recycle old devices,
  • use products for longer periods.

This reduces pressure on natural resources.

Final Answer

Unlimited wants increase the demand for natural resources, leading to deforestation, pollution, depletion of water and climate change. However, the fulfilment of wants and the extraction of resources can be balanced through sustainable development, responsible consumption, recycling and efficient resource management. Such choices help protect the environment while meeting human needs.

Economic Decision-Making Flow Diagram

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