Here is a model of Earth's yearly orbit around the Sun. In this model, the names of the seasons apply only to the northern hemisphere, Seasons in the Northern Hemisphere Equinox March 20 or 21 Solstice June 20,21, Spring Winter Summer Autumn Solstice December 21 or 22 Equinox s September 22 or 23 Examine the model, and think about how it would be different for the southern hemisphere. What causes the southern hemisphere to experience summer? A. Earth's north pole is tilted toward the Sun. B. Earth's axis and its equator are at different angles. C. Earth's axis and its orbit plane are at different angles. D. Earth's south pole is tilted toward the Sun.​