Answer:
Converts glucose and oxygen into water and carbon dioxide, which releases energy as ATP
Step-by-step explanation:
Cellular respiration is the process in which sugars are broken down into energy that can be used, so energy - or ATP - must be a product. Also, the chemical equation for the process is the following (the reactants are on left side of the arrow while the products are on the right):
⇒

So, since
represents glucose and oxygen and
represents carbon dioxide and water, the answer must be the third option listed.