Which category of animal always maintains a consistent body temperature?

The category of animal that always maintains a consistent body temperature is known as a "homeothermic" animal. Homeothermic animals are able to regulate their body temperature within a narrow range, regardless of the temperature of their surroundings. This allows them to maintain a stable internal environment, which is essential for many physiological processes. Mammals and birds are examples of homeothermic animals. These animals have specialized adaptations, such as insulation and the ability to generate metabolic heat, that enable them to maintain their body temperature even in extreme environmental conditions.