"Cold-blooded" refers to animals that rely on external environmental temperatures to regulate their body heat. These creatures, such as reptiles, amphibians, and fish, do not generate their own body heat and often become less active in cooler conditions. Their metabolism slows down in lower temperatures, which can affect their feeding and movement. Unlike warm-blooded animals, which maintain a constant internal temperature, cold-blooded animals adapt to their surroundings. This adaptation allows them to thrive in various habitats, but it also means they are more vulnerable to temperature changes. Examples of cold-blooded animals include snakes, frogs, and lizards.