What is a 'Protective Shield of Ozone' ?

Explanation

### Step-by-Step Solution:

1. **Definition of Ozone Layer**: The ozone layer is a region of Earth's stratosphere that contains a high concentration of ozone (O₃) molecules. It is located approximately 10 to 30 miles above the Earth's surface.

2. **Function of the Ozone Layer**: The primary function of the ozone layer is to absorb the majority of the sun's harmful ultraviolet (UV) radiation. This absorption helps to protect living organisms on Earth from the damaging effects of UV rays.

3. **Protection Against UV Rays**: The ozone layer acts as a protective shield by filtering out harmful UV radiation. Without this layer, these rays can reach the Earth's surface in higher amounts, leading to various health and environmental issues.

...