Fact 1: An earthquake causes the ground to shake.

Fact 2: Earthquakes are caused by movement of the tectonic plates.

Given the two facts above, answer the question "what makes the ground shake?" with the following options: 
- 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


 

  movement of tectonic plates       