You are presented with the question "Faulting of rock in Earth 's crust causes what?" and the following answer choices: 
- friction
 - conversion
 - mitosis
 - loose soil
 - tremors
 - Movement
 - crust
 - waves

Now knowing that faulting of rock in Earth 's crust causes earthquakes and earthquakes and tremors are common in Yellowstone, choose the best answer.


 

     tremors    