Answer:
D) a group of feathered, endothermic dinosaurs
Explanation:
Birds are a group of endothermic dinosaurs, characterized by feathers, epidermal structures that form plumage. Warm-blooded animal species (endothermic) maintain the body temperature higher than their environment.
Answer A is false because although birds are feathered and lack teeth, they are NOT ectothermic lizards.
Answer B is false because although birds lay amniotiv eggs, birds are a different taxonomic group than mammals, and not all birds fly.
Answer C is false because although some reptiles are closely related to birds, the current scientific consensus is that birds are a group of dinosaurs. Also, not all birds fly, and although they have lost the teeth, they have NOT lost the amniotic egg.
