Question

how are the troposphere, stratosphere, and thermosphere important for supporting life on earth? which layer of the atmosphere is likely the most important for life on earth

Answer 1

The troposphere contains 75% of the atmospheric mass as well as the oxygen and carbon dioxide plants and animals need to survive. The stratosphere’s ozone layer absorbs ultraviolet radiation which is harmful to living organisms. The thermosphere absorbs solar radiation and helps to regulate the Earth’s temperature. All layers of the atmosphere are important for supporting life on the Earth, but the troposphere is the most important as it provides organisms with the air they breathe.

Step-by-step explanation:

edg 2020

Answer 2

Troposphere - sunlight passes here, warms Earth's surface.
Stratosphere - The ozone layer causes temperatures in the stratosphere to increase as altitude increases,
Mesosphere and Thermosphere - most meteors burn up in these layers instead of striking Earth.

The answer is the Troposphere. Since it includes all the air we breathe - and all other plants and animals. Also, almost all human activity happens within the troposphere.