Fact 1: The surface of a beach is formed by mechanical weathering. Fact 2: Examples of mechanical waves include water waves, waves on a string, and sound waves. Given the two facts above, the surface of a beach is formed by what?

Choose your answer from:
i. cracking;
ii. ocean surface;
iii. water type;
iv. sun's heat;
v. water waves;
vi. forces;
vii. evaporation;
viii. water views;
Answer:
v.