What sort of circulatory system do frogs, toads, and salamanders share?\nOptions:\n- (A) live birth\n- (B) It helps them survive\n- (C) matter vibrating\n- (D) two-chambered heart\n- (E) Veins and arteries.\n- (F) biological diversity\n- (G) three-chambered heart\n- (H) four-chambered heart
Let's be accurate as possible. Think before you answer.
(G)
Amphibians have a relatively complex circulatory system with a three-chambered heart.

Frogs, toads and salamanders are amphibians.

Frogs, toads and salamanders have a relatively complex circulatory system with a three-chambered heart.

.

The final answer: (G)