Fact 1: Erosion causes a river to become deeper and wider.

Fact 2: Canyon formed as a consequence of river erosion.

Given the two facts above, answer the question "What are formed as rivers become deeper and wider?" with the following options: 
- sinkholes
 - soils
 - body water
 - loose soil
 - craters
 - mountains
 - canyons
 - Sediment


 

       canyons  