Answer:
The path along which the Earth moves in the universe has the shape of an ellipse. The sun is not in the center of that ellipse.
Explanation:
For that reason, the distance between the Earth and the Sun changes periodically during the year.
The transition from the warm season (spring, summer) to the cold season (autumn, winter) occurs because the Earth is moving away from the Sun.
If the Earth's axis were at a right angle to the Earth's orbit around the Sun, the seasons would not exist, every day would be the same.
