The chart shows four stages of demographic transition.

D. Lots of people die. Lots of people are born to make up for it. We can see this from the high orange and purple lines.

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.