You are presented with the question "What are formed by flowing rivers through erosion over long periods of time." and the following answer choices: 
- streams
 - soft soil
 - patch reefs
 - flooding
 - Sediment
 - seas
 - deep gorges
 - wildfires

Now knowing that most canyons are formed by flowing rivers through erosion over long periods of time and smithfield Canyon, a deep gorge through the mountains, dominates the view to the west, choose the best answer.


 

       deep gorges  