Answer:
Organ reserve
Explanation:
Organ reserve is related to the physical changes in which an organ of an individual returns to its original state with many episodes of stress. Organ reservation is typically related to the older people cope up with the stressful situation that is related to the aging. But it is not clearly defined n the molecular form. It happens when someone loses the function in old age because of aging. Aging changes in the body cells, tissues and organs, and these changes are related to changes in the body functioning.