The layer of fat beneath the skin of mammals helps control temperature by

  • A. producing heat through metabolism
  • B. increasing blood flow to the surface
  • C. insulating the body against heat loss
  • D. absorbing sunlight

Explanation

Subcutaneous fat conducts heat poorly, so it keeps core warmth in, which is why marine mammals carry thick blubber. Generating heat is the job of metabolism in liver and muscle, not of fat.

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