You are presented with the question "What causes landslides?" and the following answer choices: 
- Water expanding
 - tectonic plates
 - rainfall
 - Physical weathering
 - flooding
 - mouth of rivers
 - a hydraulic system
 - deforestation

Now knowing that tectonic plates being pushed together causes earthquakes and landslides caused by earthquakes , choose the best answer.


 

  tectonic plates       