Fact 1: An earthquake causes the ground to shake.

Fact 2: Landslides are often triggered by the shaking of earthquakes.

Given the two facts above, answer the question "What causes landslides?" with the following options: 
- earthquakes
 - deforestation
 - scattered light
 - rainfall
 - Water expanding
 - erosion
 - mouth of rivers
 - flooding


 

 earthquakes        