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

Fact 2: Tides also cause currents.

Given the two facts above, answer the question "What does the gravitational pull of the Moon on Earth 's oceans cause?" with the following options: 
- kite surfing
 - erosion
 - currents
 - fishing
 - waves
 - flooding
 - rivers
 - algae bloom


 

   currents      