Answer: C
Explanation: Erosion is when something breaks up over a long period of time, specifically rocks. If something is breaking up the shape of it will change, thus the answer is C, erosion.
Answer:
C. The polar vortex and tropical breezes
Answer:
The amount of fuel used to heat and cool your home can be reduced by good insulation.
The answer is B.
A. can't be right because the Aborigines were not Indians, because the Indians were the first people in North America.
C. isn't right either only because the Archaic Indians lived in South America .
D. can't be right because Mesoamericans also lived in South America.
