Northern Hemisphere winters are colder than Northern Hemisphere summers because Northern Hemisphere winters are colder than Northern Hemisphere summers because a) Earth is closer to the sun during the summer than it is during the winter. b) the snow that falls in the northern latitudes cools Earth during the winter. c) the light from the sun shines more directly on the Northern Hemisphere during the summer. d) the period of sunlight is longer during the summer than during the winter. e) both c) and d) above are correct