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

Now knowing that fish have a circulatory system with a two-chambered heart and fish species include salmon and trout, choose the best answer.


 

  trout       