Question

exercise helps boost ______ , which are chemicals in our brains that make us feel good.
○ endorphins
○ cortisol
○ adrenaline

Explanation:

Endorphins are neurotransmitters (brain chemicals) released during exercise that produce feelings of well - being and reduce pain. Cortisol is a stress - related hormone, and while adrenaline is also related to the body's response to stimuli, it's not primarily associated with the "feel - good" effect from exercise like endorphins are.

Answer:

A. endorphins