You are presented with the question "what have evolved from reptile scales of bipedal dinosaurs called theropods" and the following answer choices: 
- animals
 - fur
 - feathers
 - fur and fat
 - mammals
 - warm-blooded
 - hair
 - eyes

Now knowing that birds evolved from a group of bipedal dinosaurs called theropods and bird's feathers have evolved from reptile scales, choose the best answer.


 

   feathers      