Amphibians have a relatively complex circulatory system with a three-chambered heart.
Toads and frogs are both amphibians.
Toads have a relatively complex circulatory system with a three chambered heart.
What has a three chambered heart?
A) alpacas
B) goats
C) elms
D) bats
E) orchids
F) mammals
G) a fish
H) toads