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 Let's be accurate as possible.
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Chordates have a complete digestive system and a closed circulatory system. Vertebrates have a closed circulatory system. Chordates are vertebrates.
The final answer: (F).
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