What causes changes in the sizes, shapes, and positions of Earth's continents and oceans?

A.
very strong ocean currents
B.
global wind belts
C.
continental drift
D.
tectonic plate motion

mammal

explanation:

bc blah

explanation:

bc blah

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.