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The Arctic fox and hare in the pictures have an adaptation that allows them to survive in the snow-covered winter.
Which of the following is that adaptation, and which of the following is its cause?
Arctic Fox. N.d. Web. 28 Dec. 2015. https://en.wikipedia.org/wiki/Arctic_fox.
Arctic Hare. N.d. Arctic Hare. Web. 28 Dec. 2015. https://en.wikipedia.org/wiki/Arctic_hare.
They hibernate, and this is caused by a reduction in their metabolism.
Their fur changes to white in the winter, which is caused by photoperiodism.
Their fur changes to white, which is caused by a reduction in their food supply.
Their fur changes to white, which is caused by their eating mostly proteins.