What is one factor that contributes to seasons occurring in Pennsylvania?

A. The revolution of the moon around Earth

B. The tilt of Earth on its axis

C. The rising and falling of ocean tides

D. The distance of Earth from the sun

B. the tilt of the Earth on it's axis

The moon affects the tides by it's gravitational pull on Earth. So the moon has no affect on the earth's seasons. The distance from earth from the sun only affects the ability of Earth to sustain liquid water because earth is in something scientists like to call the "Goldilocks Zone" This has no affect on the seasons. However, the angle at which the sun's light hit the earth does effect seasonal changes and it's tilt does change.