Fact 1: Webbed feet are used for moving faster through water by aquatic animals.

Fact 2: Feet are webbed and serve as a rudder.

Given the two facts above, answer the question "What are used as a rudder by aquatic animals?" with the following options: 
- dorsal
 - squids
 - feet
 - fibers
 - Tail
 - sharks
 - gills
 - clams


 

   feet      