Faulting of rock in Earth 's crust causes earthquakes, and thrust faults are a result of compressional forces in the Earth's crust. Given these facts, what causes earth quakes among the following options:
- electromagnetic energy
 - movement
 - harmful substances
 - the force
 - shaking
 - compressional forces
 - Water expanding
 - energy of moving objects


 

      compressional forces   