Ectotherms are animals that rely on external sources of heat to regulate their body temperature. Unlike endotherms, which generate heat internally, ectotherms absorb warmth from their environment, such as sunlight or warm surfaces. This group includes many species, such as reptiles, amphibians, and fish. Because of their dependence on external temperatures, ectotherms often become less active in cooler conditions and may seek out warmer areas to maintain their body heat. Ectotherms have various adaptations to survive in their environments. For instance, some can change their behavior, like basking in the sun to warm up or seeking shade to cool down. Their metabolic rates can also vary with temperature, meaning they may require less food when it's cooler. This energy-efficient lifestyle