You are presented with the question "what makes the ground shake?" and the following answer choices: 
- after too much water received
 - movement of tectonic plates
 - At the peak of a mountain
 - a hemisphere is tilted away from the sun
 - exposure to cold
 - clouds
 - soil
 - the sun

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


 

  movement of tectonic plates       