explain how natural processes, such as volcanic eruptions, solar activity, and air movements affect ozone levels in the stratosphere.

The natural processes, such as volcanic eruptions, solar activity, and air movements affects the ozone levels indirectly by increasing chlorine's effectiveness at destroying ozone.

Explanation:

Stratosphere is the second layer form the surface of earth extending from 10 km to 50 km. The airplanes fly in the lowermost region of stratosphere. The ozone layer in the stratosphere is the guiding shield of UV rays from sunlight, it is destroyed by the compounds like chlorine and bromine. When the natural process like volcanic eruption occurs then particles like aerosols are produced. These aerosols increases the activity of chlorine and its effectiveness for the destruction of ozone.