Where is most of the carbon on earth stored?
a) soil and air
ob) plants and soil
c) animals and air
d) plants and animals

Most of the carbon in the earth is stored in the soil and air.

A) soil and air

Explanation:

Most of the carbon on earth is stored in rocks in the soil. There is approximately 2500 billion tons of carbon in the soil. The amount of carbon in the air is 800 billion tons and the amount of carbon found in plants and animals is 560 billion tons.

This clearly tells that most of the carbon in earth is stored in soil and air. The movement of carbon within the biosphere makes up the carbon cycle.