Question

which chemicals related to feelings of happiness are released when people exercise?
endorphins
adrenaline
estrogen
testosterone

Explanation:

Endorphins are known as "feel - good" chemicals. They are released during exercise and can contribute to feelings of happiness and well - being. Adrenaline is a stress - related hormone, estrogen is a female sex hormone, and testosterone is a male sex hormone.

Answer:

A. endorphins