What’s the answer for the extra credit ? answer this

The football player may have eaten a salad before the game. The salad was broken down into ATP, which is energy. Furthermore, the salad would not even exist without the energy of the sun, which produced the football player's food.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.