Why does a skydiver accelerate as she falls to the earth before opening her chute? a) because she loses mass during her travel b) because she gets further from the airplane c) because the force of the earth pulls on her d) because fewer forces are present to slow her down as she drops eliminate

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.