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 " rivers cut deeper and wider to form what" with the following options: 
- canyons
 - arteries
 - Roads
 - timberlands
 - old growth forests
 - soils
 - Sediment
 - coral reefs


 

 canyons        