Birds are vertebrate endotherms with what?\nOptions:\n- (A) fat\n- (B) Energy\n- (C) legs\n- (D) like some sharks\n- (E) Tail\n- (F) invertebrates\n- (G) arms\n- (H) four
Please answer and provide answer explanation.
(C)
Birds are endothermic tetrapod vertebrates.

Legs define Tetrapods.

Birds are vertebrate endotherms with legs.

.

The answer is (C)