Exercise increases the release of this hormone, which is responsible for feelings of happiness and well-being. question 4 options: endorphins melatonin eustress progesterone

Endorphins block blocks pain but also increases with exercise. Melatonin helps with sleep Eustress is a positive form of stress that helps the body with emotional well being. Progesterone  is what is produced in a woman's body  otherwise known as "Pregnancy Hormone"

answercobra of 1985;

your answer will be a. sorry if im wrong: )