Answer: Ocean surface wind
Explanation: Ocean surface wind are generated in the ocean due to the abrasion or rubbing between the prevailing wind and the surface waves. They are formed at the top of the ocean surface.
When the wind is very strong, it generates surface waves of bigger wavelength and bigger height. But at the bottom, the waves moves at a slower rate. This waves are formed due to the wind.
This waves can rise upto hundreds of feets during tsunamis. Thus, this waves breaks as they reach the shoreline.