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 OK. Let's think hard:
User
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.
So, the final answer is (G).
Assistant