Which theory of aging proposes that the body wears out, part by part, after years of use?

Question

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The wear-and-tear theory of aging posits that the body wears out, part by part, after years of use. Over time, the body's tissues and organs become damaged by cumulative exposure to environmental stressors, such as radiation, toxins, or mechanical strain. This damage eventually leads to a decline in function and ultimately, death.

Which Theory of Aging Proposes That the Body Wears Out