Grooves running down the sides of a riverbank are most likely caused by
A B C D
wind. rocks. leaves. rainwater.
Question: Grooves running down the sides of a riverbank are most likely caused by
(A) wind.
(B) rocks.
(C) leaves.
(D) rainwater.

Answer: (D) rainwater.
Answer: (C) leaves.
Question: Grooves running down the sides of a riverbank are most likely caused by
(A) wind.
(B) rocks.
(C) leaves.
(D) rainwater.
Answer: (D) rainwater.