Which group of animal maintain their body temperature in diffrnt environment?

Ectothermic animals, such as reptiles, amphibians, and most fish, rely on external environmental conditions to regulate their body temperature. In contrast, endothermic animals, including mammals and birds, maintain a constant body temperature regardless of the environment through metabolic processes. This ability allows endothermic animals to thrive in a wider range of habitats and conditions compared to ectotherms.