You are presented with the question "Tsunamis are often cause by what in the earth's crust?" and the following answer choices: 
- waves
 - faulting.
 - flooding
 - pressure
 - friction
 - Movement
 - erosion
 - heat

Now knowing that faulting of rock in Earth 's crust causes earthquakes and earthquakes can cause a tsunami, choose the best answer.


 

  faulting.       