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

Fact 2: Major rivers include the Severn, Thames and Trent.

Given the two facts above, answer the question "what gets deeper and wide from erosion?" with the following options: 
- meters
 - form sand
 - soil
 - Thames
 - mountains
 - flooding
 - Roads
 - Sediment


 

    Thames     