Question

ozone in the stratosphere forms the ozone layer and is beneficial. where is ozone a pollutant? troposphere mantle

Explanation:

Ozone in the stratosphere is beneficial (forms ozone layer to protect from UV rays). In the troposphere (the lowest layer of Earth's atmosphere, where we live), ozone is a pollutant as it can cause respiratory issues and harm vegetation. The mantle is part of Earth's interior and not related to atmospheric ozone pollution. So the correct option is the one with "Troposphere".

Answer:

Troposphere