How do the material of the three major compositional layers of earth differ ?

they differ by the State of matter

solid, liquid, gas

i think that the best answer would be c.

tell me if im wrong : )

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.