Brainliest! question is in pic

I know the muffin man and the muffin man knows me lol

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.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.