Fact 1: Damming a river can cause a lake to form.

Fact 2: The beavers live on this side, and create dams.

Given the two facts above, answer the question "What animal can cause a lake to form?" with the following options: 
- trout
 - Beavers
 - Clams
 - salmon
 - Lake Trout
 - Sea Otters
 - Dam
 - mussels


 

  Beavers       