Which weather system would most likely form when cool air falls back to the surface over warm ocean water?i will give brainliest to whoever answers

I think the answer is a hurricane.

Hurricane is made of warm and cool air. Warm air has a higher temperature and less dense than cool air. It causes the warm air to move upward while the cool air moves downward. The warm air carries water vapour and it will condense after elevated, releasing the heat and makes the air cool. 
If these events repeated continuously, there will be a constant movement of air.

A hurricane is a weather system that would most likely form when cool air falls back to the surface over warm ocean water.