The answer is C, or #3. Chemical weathering changes the composition of a rock, while physical weathering does not.
Answer and Explanation:
Sediment transport occurs in natural systems where the particles are clastic rocks (sand, gravel, boulders, etc.), mud, or clay; the fluid is air, water, or ice; and the force of gravity acts to move the particles along the sloping surface on which they are resting.
--- GeorgeLS ---