You are presented with the question "what have a circulatory system with a two-chambered heart?" and the following answer choices: 
- toads
 - Birds
 - trout
 - animals
 - sharks
 - pan
 - mammals
 - salmon

Now knowing that fish have a circulatory system with a two-chambered heart and trout is an extremely versatile fish, choose the best answer.


 

   trout      