Answer:
1. The tilt of the earth determines the seasons. When it is summer in the southern hemisphere, the south is pointed towards the sun and receives the most direct sunlight. The north is pointed away from the sun and it creates winter.
2. The winter solstice is around December 21 in the northern hemisphere. The earth is tilted 23.4 degrees and is the furthest from the sun.
3. The summer solstice is around June 21 in the northern hemisphere. The earth is tilted 23.4 degrees and it the closest to the sun
