Fact 1: Hair is a fiber that is found only in mammals.

Fact 2: All mammals have fur or hair.

Given the two facts above, answer the question "Fur is a fiber that is found only on what kind of animal?" with the following options: 
- animals
 - reptiles
 - bird
 - humans
 - mammals
 - insects
 - goats
 - Animal fur


 

     mammals    