You are presented with the question "Erosion can be caused by " and the following answer choices: 
- coastlines
 - mouth of rivers
 - vehicles
 - heavy rains
 - Pesticides
 - deforestation
 - detritus
 - ice wedging

Now knowing that heavy rains cause flooding and flooding is problematic because it causes erosion problems, choose the best answer.


 

    heavy rains     