I believe Rushy is correct. The seasons have nothing to do with the distance to the Sun. In fact, if you live in the Northern Hemisphere, then you are actually closer to the Sun in the winter!
The reason we have seasons is because the spin axis of the Earth is not perpendicular to the position vector defining its orbit. In other words, the Earth is tilted. Hence, as we move around the Sun, half the time one hemisphere receives more direct sunlight, and one receives less. This makes summer and winter. Transitioning between the two gives us autumn and spring.
So the context of this information is within the RET. But I can attest to its accuracy in that context.
I ask every one of my students to explain to me the reason why we have seasons on their final exams...to many folks do not know this