Yes. The author is giving the ocean a human trait. It crashes.
Answer: The possessive pronoun in the sentence is 'theirs'.
Explanation: It shows the ownership of the idea for group skate.
Running out of air, Robert swam quickly to the surface to catch his breath.
Answer:
An organization of communist parties in 1941 to win independence for Vietnam.
Explanation:
Vietnam Doc-lap Dong Minh, the Revolutionary League for the Independence of Vietnam.