Final answer:
Seals demonstrate homeostasis by regulating their body temperature.
Step-by-step explanation:
Homeostasis is the maintenance of stable internal conditions regardless of the external environment. An example of how a seal demonstrates homeostasis is through its ability to regulate its body temperature. Seals are able to maintain a stable internal body temperature even in cold water by having a thick layer of blubber that acts as insulation and by reducing blood flow to the extremities to minimize heat loss.