Reason for Seasons

After doing this gizmo on seasons I have figured out some reasons that there are seasons. THe main factor that causes seasons is tilt of the earth. The earth has a thing called an axis that it sits on. The tilt effects the seasons because when the earth rotates there are more heat rays hiting the earth because the earth has a tilt. When the earth is higher above us there is more solar intensity. So when it is December 21 there is not as much solar intensity then there is lets say on June 21 or March 21. Now you know some of the raesons for seasons.