C ..............................
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 ---
I think the answer is <span>C. trial-and-error learning</span>
Lords could levy taxes on their townspeople! Have a great day
