Explanation:
The muscles opposing the movement become the antagonists.
In a movement, like the back extension, the muscles that extend the back are the agonist.
The muscles that produce the opposite movement, which is back flexion, are the abdominals.
Adolescence is the transitional stage from childhood to adulthood, usually the years between ages 13 and 19 which are characterized with rapid growth and puberty changes.
The statement that adolescence is universal is true. Adolescence is universal because all societies recognize adolescence as a stage of human development.
