Ozone is not present in

Options

A. thermosphere
B. Mesosphere
C. Stratosphere
D. `O_(3)` layer

Answer

To solve the question "Ozone is not present in," we need to identify the layers of the Earth's atmosphere and determine where ozone is located. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Layers of the Atmosphere
The Earth's atmosphere consists of several layers, including:
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
- Exosphere

### Step 2: Identify the Location of Ozone
Ozone (O3) is primarily found in the stratosphere, which contains the ozone layer. This layer is crucial for absorbing the majority of the sun's harmful ultraviolet radiation.

### Step 3: Analyze the Options
Given the question, we need to evaluate which of the provided options does not contain ozone. The options likely include:
- A) Troposphere
- B) Stratosphere
- C) Mesosphere
- D) Thermosphere

### Step 4: Determine Where Ozone is Present
- **Stratosphere**: Contains the ozone layer (where ozone is present).
- **Troposphere**: Contains some ozone, but it is not the primary layer for ozone.
- **Mesosphere**: Generally has very low concentrations of ozone.
- **Thermosphere**: Contains very little ozone.

### Step 5: Conclusion
From the analysis:
- Ozone is primarily found in the stratosphere.
- It is not significantly present in the thermosphere and mesosphere.

Thus, the answer to the question "Ozone is not present in" would be **C) Mesosphere** and **D) Thermosphere**.

### Final Answer
Ozone is not present in the **Mesosphere** and **Thermosphere**.

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