Final answer:
Homeostasis is the ability to maintain a stable internal environment. An example of homeostasis in an animal is the regulation of body temperature. An example of homeostasis in a plant is the regulation of water balance.
Step-by-step explanation:
Homeostasis is the ability of an organism to maintain a relatively stable internal environment despite external changes. One example of homeostasis in an animal organism is the regulation of body temperature. Humans sweat to cool down and maintain a constant body temperature. An example of homeostasis in a plant organism is the regulation of water balance. Plants have specialized structures like stomata that open and close to control water loss and prevent dehydration.