Answer:
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The respiratory system contains the lungs, so the answer is C. Hope this helps.
First of all the reason the graph would be a curve is because, as the time increases the position changes, at first the ball is at a certain point then it starts rolling off a cliff so its moving foward and then the ball starts falling, (If too confusing here is a image http://www.mazzworld.net/U11Image1.gif)
Answer:
An geographic area where living things, organisms and weather work together to form a community.
Explanation:
