Aquaporin allows water molecules to move very rapidly across a plasma membrane. what would be the best definition of this process?

it's c. (to reduce the greenhouse effect/carbon gasses)

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.