Answer:
stamina
Explanation:
a proper focus and hardwork for the achievement
Epidermis; the blood vessels contract. Epidermis; the blood vessels dilate. Dermis; the blood vessels dilate. Dermis; the blood vessels contract. i think it D
During weight training, you should exhale during he concentric phase or when you're doing the hardest work.
The excretory system. It gets rid of waste.
