Final answer:
Cellular respiration is a process in cells where food and oxygen are broken down to form new compounds that release energy needed for cellular work.
Step-by-step explanation:
Cellular respiration is a process in cells where food molecules and oxygen are broken down to form new compounds. These compounds release energy that the cell needs to perform work, such as cellular respiration. The energy is stored in the form of ATP. The products of cellular respiration are carbon dioxide and water, and the process requires the presence of oxygen.