Zach insists that the seasons are caused by the elliptical shape of Earth's orbit. He says that

Question:

Zach insists that the seasons are caused by the elliptical shape of Earth's orbit. He says that it is summer when Earth is closest to the Sun and winter when it is farthest away from the Sun. What evidence can you think of to show that the seasons are not due to the change in distance between Earth and the Sun?