Final answer:
ATP is the primary source of energy for living things.
Step-by-step explanation:
ATP (adenosine triphosphate) is the primary source of energy for living things. It is a molecule that stores and releases energy during cellular processes. When ATP is broken down into its components, adenosine diphosphate (ADP) and inorganic phosphate, energy is released and can be used by cells for various activities.
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