Final answer:
Cellular respiration is common to all life forms because it is essential for the production of ATP, the primary energy currency in cells.
Step-by-step explanation:
Cellular respiration is the process by which cells break down glucose in the presence of oxygen to produce carbon dioxide, water, and energy in the form of ATP (Adenosine Tri-Phosphate). This process is common to all life forms because it is essential for the production of energy that powers various cellular activities. The main goal of cellular respiration is to produce ATP, which is the primary energy currency in cells.