You are presented with the question "The ground shakes as a result of the movement of what?" and the following answer choices: 
- Earth's core
 - Electrical energy
 - tectonic plates
 - kinetic energy
 - vehicles
 - electromagnetic energy
 - earth
 - magnetics

Now knowing that an earthquake causes the ground to shake and earthquakes are caused by movement of the tectonic plates, choose the best answer.


 

   tectonic plates      