You are presented with the question "What can be pushed together to form an earthquake?" and the following answer choices: 
- fibrils
 - volcanos
 - crust
 - energy
 - trees
 - waves
 - boulders on the earth
 - rocks

Now knowing that tectonic plates being pushed together causes earthquakes and tectonic plates can contain both continental and oceanic crust F 25, choose the best answer.


 

   crust      