What has circulatory system with a two-chambered heart?
Options:
- (A) sharks
- (B) trout
- (C) pan
- (D) toads
- (E) Birds
- (F) animals
- (G) mammals
- (H) Man Let's solve this problem gradually.
Fish have a circulatory system with a two-chambered heart. Fish species include salmon and trout. Salmon and trout have a circulatory system with a two-chambered heart. So the final answer is (B).