Hi !
Answer:
<em>Regular aerobic exercise releases </em>"endorphins" <em>, which serve as the body’s natural painkiller.</em>
D. endorphins
The ability to recover, or "bounce back," from extreme or prolonged stress would most likely be resilience.
<span> It is removed by the lymphatic vessels.</span>
do exercises by moving his head from side to side, rolling his shoulders to stretch, tucking his chin, and looking left and right while looking at the ceiling. Hope this helps!