Which of the following best explains why it is necessary for the body to eliminate waste?
1. to allow the body to maintain a certain size
2. to keep the body's internal environment in balance
3. to make room for nutrients coming in
4. to reduce unpleasant odors

the answer is c.mitochondria. glad to .

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.