A diagram explaining the cause of the seasons shows the Earth in its orbit around the sun. What is the main factor in how the changing seasons occur?

1.how fast the sun sends rays to the Earth
2.the speed at which the Earth rotates during the year
3.the tilt of the Earth on its axis in relation to the sun
4.how close the Earth is to the sun

3. the tilt of the Earth on its axis in relation to the sun

The main factor in how the changing seasons occur is the tilt of the Earth on its axis in relation to the sun. This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year, leading to the changing seasons.