The animal known for its ability to change colors is the chameleon. These reptiles belong to the family Chamaeleonidae and are primarily recognized for their remarkable color-changing abilities, which serve multiple purposes. Chameleons can change their skin color in response to temperature changes, light, and emotional states, helping them with camouflage, communication, and social signaling. They possess specialized cells in their skin called chromatophores that contain different pigments. By expanding or contracting these cells, chameleons can produce a wide range of colors and patterns. This unique ability makes them fascinating subjects for study in terms of behavior and adaptive evolution.