I believe the answer is C due to the fact that delta is built from rocks, mud, soil and moraines is built from rocks, sand, gravel and soil (I tried)
Answer: Since the base of a cylinder is a circle, we substitute 2πr for p and πr2 for B where r is the radius of the base of the cylinder.
Explanation:
The answer is B I believe
Boats and ho's. buts its coal and steel.