A student finds a round, smooth pebble on a beach. Which action made the pebble smooth?
A B C D
rain falling wind blowing snow melting waves moving
Question: A student finds a round, smooth pebble on a beach. Which action made the pebble smooth?
(A) rain falling
(B) wind blowing
(C) snow melting
(D) waves moving

Answer: (D) waves moving
Answer: (A) rain falling
Question: A student finds a round, smooth pebble on a beach. Which action made the pebble smooth?
(A) rain falling
(B) wind blowing
(C) snow melting
(D) waves moving
Answer: (D) waves moving