Question

Which layer of the Earth's atmosphere contains the ozone layer, crucial for environmental design?

• A. Troposphere
• B. Stratosphere
• C. Mesosphere
• D. Thermosphere

Hint:

Remember: “Strato = shield” — the stratosphere shields Earth from harmful UV radiation via the ozone layer.

Answer 1

The Correct Option is B

Concept: The Earth's atmosphere is divided into several layers based on temperature and altitude. The ozone layer, which protects life by absorbing harmful ultraviolet (UV) radiation from the sun, is located in the stratosphere.
Step 1: Understand atmospheric layers.

• Troposphere – lowest layer, weather occurs here
• Stratosphere – contains ozone layer
• Mesosphere – meteors burn here
• Thermosphere – very high temperatures, includes ionosphere

Step 2: Identify the correct layer.
The ozone layer is concentrated in the stratosphere at an altitude of about 10–50 km above Earth’s surface.
Step 3: Importance of ozone layer.

• Absorbs harmful UV-B and UV-C radiation
• Protects living organisms
• Plays a role in environmental and climatic balance

Step 4: Conclusion.
Thus, the correct answer is the Stratosphere.