You are presented with the question "What are formed as rivers become deeper and wider?" and the following answer choices: 
- sinkholes
 - soils
 - body water
 - loose soil
 - craters
 - mountains
 - canyons
 - Sediment

Now knowing that erosion causes a river to become deeper and wider and canyon formed as a consequence of river erosion, choose the best answer.


 

       canyons  