The answer is D. Chemical Weathering.
Chemical weathering is the process that changes the composition of rocks by dissolving them. It occurs when rocks are exposed to water, acids, or other chemicals. These chemicals react with the minerals in the rocks, breaking them down and dissolving them over time.
Erosion and deposition are both physical processes that break down rocks and move them from one place to another. Physical weathering is the process that breaks down rocks without changing their composition.
Therefore, the correct answer is D. Chemical Weathering.