Amphibians have a relatively complex circulatory system with a three-chambered heart, and frogs, toads and salamanders are amphibians. Given these facts, which animal has a circulatory system with a three-chambered heart among the following options:
- animals
 - Salamander
 - fur seals
 - mammals
 - alpacas
 - a fish
 - warm-blooded
 - barnacles


 

  Salamander       