You are presented with the question "the movement of tectonic plates causes what?" and the following answer choices: 
- friction
 - erosion
 - to move people
 - climate
 - debris flows
 - flooding
 - Movement
 - global warming

Now knowing that the movement of tectonic plates causes volcanic eruptions and among the most destructive types of debris flows are those that accompany volcanic eruptions, choose the best answer.


 

     debris flows    