Answer the following question given this paragraph: 

A: Most ocean waves are caused by wind blowing across the water. Moving air molecules transfer some of their energy to molecules of ocean water. The energy travels across the surface of the water in waves. The stronger the winds are blowing, the larger the waves are and the more energy they have.


Q: Most ocean waves are caused by what?

 Choices:

- radiation

- animals

- gravity

- wind

A:
wind
