Question

in what form is carbon found in the atmosphere?
co₂
c₆h₁₂o₆
h₂o
atp

Explanation:

Carbon in the atmosphere is mainly in the form of carbon - dioxide ($CO_2$). Glucose ($C_6H_{12}O_6$) is a sugar found in living organisms, water ($H_2O$) contains no carbon in terms of the question context, and ATP (adenosine tri - phosphate) is an energy - carrying molecule in cells.

Answer:

A. $CO_2$