Which statement about cellular respiration is true? it produces oxygen. it requires water. it is used by every living cell. it converts energy to food.

The only true statement is that cellular respiration is used by every living cell. There are two forms of cellular respiration: aerobic, where oxygen is required, and anaerobic, where it is not. The other statements are false, in that although oxygen and water can be part of the cellular respiration process, they are not expressed in the ways listed. Cellular respiration also does not convert energy to food, it converts food to energy. Hope this answer helps!