Photosynthesis is important to living organisms because it is

A. the foundation of most food chains.

B. the source of nitrogen gas in the air.

C. how animals get carbon dioxide to breathe.

D. the process that occurs in most ecosystems.

answer: c

explanation:

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.

the answer to your question is tooth decay.