Question

bacteria release carbon dioxide back into the atmosphere through which process?
photosynthesis
diffusion
respiration
decomposition

Explanation:

Photosynthesis uses carbon dioxide. Diffusion is a passive movement of molecules. Decomposition is a broader process of breaking down organic matter. Respiration is the process where organisms (including bacteria) release carbon dioxide as a by - product when they break down organic molecules for energy.

Answer:

C. respiration