Question

how can the atmosphere be categorized? as a system of clouds as a system of heat as a system of gases as a system of life

Explanation:

The atmosphere is a mixture of gases like nitrogen, oxygen, carbon - dioxide etc. Clouds are just a part of the atmosphere's moisture - related phenomena, heat is a property that can be transferred within the atmosphere, and life exists on Earth's surface and within the biosphere which interacts with but is not the same as the atmosphere itself. So, the atmosphere is best categorized as a system of gases.

Answer:

as a system of gases