Final answer:
The term that means 'the way each part of a living thing is used' is Function.
Step-by-step explanation:
The term that means 'the way each part of a living thing is used' is Function. Function refers to the role or purpose that each part of a living thing serves in its overall operation. For example, in the human body, the heart's function is to pump blood, the lungs' function is to exchange oxygen and carbon dioxide, and the stomach's function is to digest food.
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