Cockles help to keep waters clean and clear. Explain how they do this, use their anatomy to support your answer.

its 42

i say its d?

i think its y= -4x-14

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.

ok yes, but what is the question? as soon as you ask the actual question i will answer it. : )