Fact 1: The gravitational pull of the Moon on Earth 's oceans causes the tides.

Fact 2: Energy is pumped into the ocean by the winds and tides.

Given the two facts above, answer the question "the gravitational pull of the Moon on Earth's oceans pumps what into the oceans?" with the following options: 
- rivers
 - oxygen
 - saltwater
 - seaweed
 - energy
 - water
 - fish
 - h2o


 

     energy    