What animal relies on interactions with the environment's to control body temperature?

Reptiles, such as lizards and snakes, rely on interactions with their environment to regulate their body temperature, a process known as thermoregulation. Since they are ectothermic (cold-blooded), they depend on external heat sources, like sunlight or warm surfaces, to raise their body temperature, and seek shade or burrows to cool down. This reliance on environmental conditions is crucial for their metabolic processes and overall survival.