You are presented with the question "What does the gravitational pull of the Moon on Earth 's oceans cause?" and the following answer choices: 
- Energy.
 - two
 - waves
 - fires
 - the Sun
 - sunlight
 - rivers
 - erosion

Now knowing that the gravitational pull of the Moon on Earth 's oceans causes the tides and high tide is when the best waves come in, choose the best answer.


 

   waves      