The material moved by erosion is sediment. Deposition occurs when the agents, usually wind or water, of erosion lay down sediment. Deposition changes the shape of the land. Water's movements (both on land and underground) cause weathering and erosion, which change the land's surface features and create underground formations.
tbh it could be A or B but it's most likely A because emergency responders have to save people from their flooding or damaged houses while facing extreme weather themselves :)
