Final answer:
Polar bears have a layer of fat for insulation and energy storage.
Step-by-step explanation:
A polar bear's body has a thick layer of fat, also known as blubber, for two main reasons: insulation and energy storage.
- Insulation: The layer of fat acts as an excellent insulator, helping to keep the polar bear warm in its icy habitat. It prevents heat from escaping the body and protects the bear from frigid temperatures.
- Energy Storage: The thick layer of fat serves as an energy reserve for polar bears. They rely on their fat stores during periods of scarce food availability, such as when they cannot hunt due to the lack of sea ice.
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