Answer :
Final answer:
Birds are endothermic vertebrates with hollow bones that regulate their body temperature internally.
Explanation:
Birds are endothermic vertebrates with hollow bones. Their ability to regulate body temperature internally distinguishes them from ectothermic vertebrates like reptiles. This adaptation allows birds to maintain a constant body temperature regardless of external conditions.
Learn more about Endothermic vertebrates with hollow bones here:
https://brainly.com/question/39512442
