An example of an organism not being able to reach homeostasis through internal changes in terms of temperature is a cold-blooded animal, such as a lizard. Cold-blooded animals depend on external sources of heat to regulate their body temperature, and they are unable to internally regulate their temperature like warm-blooded animals can. If a lizard is in a cold environment and cannot find a warm enough place to bask in the sun, it may struggle to maintain a stable body temperature and may not be able to reach homeostasis.
