In which of the region of earth's atmosphere temperature decreases with height?

Options

A. lonosphere
B. stratosphere
C. troposphere
D. mesosphere

Answer

To determine in which region of the Earth's atmosphere the temperature decreases with height, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Layers of the Atmosphere**:
The Earth's atmosphere is divided into several layers:
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere (which includes the ionosphere)
- Exosphere

2. **Analyze Temperature Variation**:
- In the **Troposphere** (the lowest layer), temperature decreases with an increase in height. This is because the Earth's surface absorbs heat from the sun and warms the air above it. As you go higher, the air is less dense and cooler.
- In the **Stratosphere**, the temperature actually increases with height due to the presence of the ozone layer, which absorbs ultraviolet radiation.
- In the **Mesosphere**, the temperature again decreases with height.
- In the **Thermosphere** and **Exosphere**, the temperature increases with height due to the absorption of high-energy radiation.

3. **Identify the Correct Region**:
Based on the analysis, the region where the temperature decreases with height is primarily the **Troposphere**.

4. **Select the Correct Option**:
If the options provided are labeled A, B, C, and D, the correct answer corresponding to the Troposphere would be option C.

### Final Answer:
The region of the Earth's atmosphere where temperature decreases with height is the **Troposphere** (Option C).

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