Fact 1: Faulting of rock in Earth 's crust causes earthquakes.

Fact 2: Earthquakes and tremors are common in Yellowstone.

Given the two facts above, answer the question "Faulting of rock in Earth 's crust causes what?" with the following options: 
- friction
 - conversion
 - mitosis
 - loose soil
 - tremors
 - Movement
 - crust
 - waves


 

     tremors    