Question

where is ozone considered a pollutant? in the stratosphere away from us deep in the ocean underwater in the troposphere close to us in the earths mantle below us

Explanation:

Ozone in the stratosphere (the upper layer of the atmosphere) is beneficial as it protects from UV radiation. However, in the troposphere (the lower layer, close to the Earth's surface), ozone is formed from pollutants and can harm human health, plants, and materials, so it's considered a pollutant there. The other options (stratosphere, ocean, Earth's mantle) are not where ozone acts as a pollutant.

Answer:

C. in the troposphere close to us