You are presented with the question "What are used as a rudder by aquatic animals?" and the following answer choices: 
- dorsal
 - squids
 - feet
 - fibers
 - Tail
 - sharks
 - gills
 - clams

Now knowing that webbed feet are used for moving faster through water by aquatic animals and feet are webbed and serve as a rudder, choose the best answer.


 

   feet      