Question

what is the purpose of cellular respiration?
to produce atp energy
to produce carbon dioxide
to produce water

Explanation:

Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into ATP (adenosine - triphosphate), and then release waste products. Carbon - dioxide and water are waste products, not the main purpose.

Answer:

to produce ATP energy