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

Fact 2: Ducks have webbed feet, designed for swimming.

Given the two facts above, answer the question "What designed for swimming are used for moving faster through water?" with the following options: 
- Limbs
 - fingers
 - feet
 - nose
 - Frogs.
 - Frogs
 - hair
 - Whales


 

   feet      