You are presented with the question "what does erosion form?" and the following answer choices: 
- valleys
 - Sediment
 - mountains
 - canyons
 - soils
 - hills
 - soft soil
 - loose soil

Now knowing that most canyons are formed by flowing rivers through erosion over long periods of time and canyon formed as a consequence of river erosion, choose the best answer.


 

    canyons     