Polar bears depend on sea ice, which melts during exceptionally warm weather, for access to food. When warm weather lasts longer than normal, polar bears accumulate fat—energy stored for their long winter hibernation—more slowly and weigh less, on average, as a result. At the same time, during periods of prolonged cold, polar bears weigh significantly less than they usually do, on average.
Which of the following, if true, does most to explain the contrast described above?
【选项】
The sea ice produced by long periods of cold weather provides shelter for marine life, increasing the populations of species that polar bears prey upon.
选项是否正确？