What group of animals do chordates belong to?\nOptions:\n- (A) graptolites\n- (B) more abundant\n- (C) warm-blooded\n- (D) four limbs\n- (E) epidermal\n- (F) Vertebrates\n- (G) animals\n- (H) insects
Reason slowly and give your answer.
(F)
Chordates have a complete digestive system and a closed circulatory system.

Vertebrates have a closed circulatory system.

Chordates are vertebrates.

.

Therefore, the answer is (F)