What are endothermic vertebrates with legs?\nOptions:\n- (A) Birds\n- (B) mammals\n- (C) Snakes\n- (D) ducks\n- (E) Lizards\n- (F) ants\n- (G) long\n- (H) toads
Reason slowly and give your answer.
(A)
Birds are endothermic tetrapod vertebrates.

Legs define Tetrapods.

Birds are endothermic vertebrates with legs.

.

Thus, the answer is (A)