ANSWERS: 2
  • Based on experiments with both free living and captive beavers the researcher found that the sound of rushing water was as annoying to a beaver as the sound of fingernails on a blackboard is to humans. And that beavers will pile up sticks and mud in any spot they hear that sound until they can no longer hear it. http://www.naturealmanac.com/archive/beaver_dams/beaver_dams.html check out this website it will tell you more
  • For their habitat.

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