Answer :

B. A walrus stays cold in the cold ocean.

Lipids can be cause for insulation in animals (fat can protect from the cold).

Answer:

B. A walrus stays warm in cold oceans

Explanation:

Lipids are the macromolecules that are stored in adipose tissues and beneath the skin surface. These lipids layer present under skin serve as insulators.

Many organisms found in colder climatic conditions such as walrus of cold oceans have a thick layer of lipids under their skin. This lipid layer is called blubber and keeps the organism warm under cold conditions.

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