Answer :
C is the answer. Particles erode from the main rock to form smaller rocks, and rock particles. It's the only answer that makes sense.
The correct answer is option D that is, moving bits of rock and soil from one place to another.
Erosion in earth science refers to the activity of surface procedures, like wind or water flow, which removes the rock, soil, or dissolved substance from one location to another location of the Earth's crust. This natural phenomenon is a result of the dynamic activity of erosive agents, like ice, water, snow, plants, wind, animals, and humans.