Damming a river can cause a lake to form, and beavers know how to cut wood and build dams. Given these facts, how do beavers change waterways among the following options:
- They warm up the water
 - marshes, bogs, and swamps
 - They soil the water
 - Earth's axis of rotation is tilted
 - several different ways
 - They make structures that split the water
 - Genetic diversity is increased
 - By tearing down dams


 

      They make structures that split the water   