Amphibians are the first true tetrapods, or vertebrates with four limbs, and tetrapod classification Tetrapods are monophyletic. Given these facts, what are monophyletic with four limbs  among the following options:
- animals
 - mammals
 - amphibians
 - warm-blooded
 - Most plants
 - alpacas
 - Conifers
 - graptolites


 

   amphibians      