look below for my questions, i really need help and school is really affecting my mental health but this site keeps saying that the questions im asking are bad or something. pls answer! 20 points.

ohk I will check it out

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.