Webbed feet are used for moving faster through water by aquatic animals, and beavers are primarily aquatic animals. Given these facts, how do beavers move through water quickly among the following options:
- it keeps an organism warm
 - lowered energy cost
 - heat is produced
 - Males and females
 - They have webbed feet
 - running and lifting
 - heat energy
 - prevents the transfer of heat


 

     They have webbed feet    