Fact 1: Amphibians are the first true tetrapods, or vertebrates with four limbs.

Fact 2: Tetrapod classification Tetrapods are monophyletic.

Given the two facts above, answer the question "what are monophyletic with four limbs ?" with the following options: 
- animals
 - mammals
 - amphibians
 - warm-blooded
 - Most plants
 - alpacas
 - Conifers
 - graptolites


 

   amphibians      