Fact 1: Erosion can cause a landslide.

Fact 2: And the erosion caused by the unimpeded flow of water is an example of unintentional change.

Given the two facts above, answer the question "What can cause landslides?" with the following options: 
- The flow of water
 - loose soil
 - Drought
 - deforestation
 - Adequate subsurface drainage
 - mouth of rivers
 - Physical weathering
 - Lack of rain


 

 The flow of water        