In a river occurs when sediment is transported and occurs at the mouth in the formation of a delta

choices;
A) deposition, erosion
B) erosion, deposition

The answer is B) erosion, deposition. Erosion is the removal of soil from one place, which can be caused by wind or water, and deposition is when sediment is deposited by the flow of a river at one place, forming fertile soil.

answer; i believe the correct answer is (fluctuated);

polar areas, such as antarctica or the south pole.