The one that decrease sensations of pain as part of the body's physical adaptations to stress is increasing the endorphin level.
What is endorphin?
Endorphin is a chemical released by the pituitary gland and hypothalamus. This chemical helps in relieving pain and stress. This chemical is released by eating, coitus, and exercise.
The realization for relief is only for sometime when this is released, to get a satisfaction for life, do work on you.
Thus, the correct option is D, Endorphin levels increasing.
Learn more about endorphin.
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