Question

oxygen plays a key role in the troposphere while ozone in the stratosphere. Elucidate.

Answer 1

We live in troposphere and atmospheric oxygen is a gas without which we cannot survive. So, it is important in troposphere.
Ozone is concentrated in stratosphere and there it protects us from UV rays from sun by reflecting or absorbing it. Hence, ozone plays a vital role in stratosphere.
Hope it helps you!

Answer 2

Troposphere is lowest level of atmosphere which contains 21 % of oxygen which is very important or us and provides all necessary oxygen to breath and also the oxygen present here try to minimize the level of ozone coming from stratosphere.

While, the stratosphere is a part of atmospheric layer above the troposphere and extends from approximately 10 km to 50 km above the Earth and about 90 percent of Earth's ozone production occurs in this layer. It is naturally formed and destroyed at a constant rate. Ozone molecules are constantly created in chemical reactions caused when the ultraviolet radiation from the sunlight strikes the stratosphere.