You are presented with the question "Parts of the Earth's crust being pushed together causes what?" and the following answer choices: 
- magnetic shifts
 - erosion
 - friction
 - earthquakes
 - solar flares
 - moonquakes
 - global warming
 - Sediment

Now knowing that tectonic plates being pushed together causes earthquakes and several tectonic plates make up the earth's crust that are in a constant state of process, choose the best answer.


 

    earthquakes     