What is the function of ozone which is present in the upper level of the atmosphere?

Explanation

### Step-by-Step Solution:

1. **Identify the Location of Ozone**:
- Ozone is primarily found in the stratosphere, which is a layer of the atmosphere located approximately 30 to 50 kilometers above the Earth's surface.

2. **Understand the Role of Ozone**:
- The ozone layer serves as a protective barrier for the Earth.

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