Which term describes animals that regulate their own body temperature?

• A. Ectothermic
• B. Amphibians
• C. Birds
• D. Endothermic

Answer: (D)

Endothermic describes animals that regulate their own body temperature. They generate heat through metabolism and use strategies like insulation, sweating or panting, and adjustments in blood flow to keep a relatively constant internal temperature, even when the environment changes. This ability is common in mammals and birds, enabling them to stay active across a wide range of climates. In contrast, ectothermic animals rely largely on external heat sources, so their body temperature shifts with the surroundings. Amphibians are typically ectothermic. The term isn’t about a specific group like birds or amphibians; it’s about how the animal manages heat.