There are two ways that the tilt of the Earth's axis causes the summers in the Northern Hemisphere. What are they? A) The sun is up shorter during the day in the summer and the tilt results in more direct sunlight during the summer. B) The sun is up longer during the day in the summer and the tilt results in less direct sunlight during the summer. C) The sun is up shorter during there say in the summer and the tilt results in less direct sunlight during the summer. D) The sun is up longer during the day in the summer and the tilt results in more direct sunlight during the summer..