are based on the cycle of the seasons, which results from the motion of the Earth around the Sun (and the fact that the Earth's axis of rotation is tilted significantly with respect to the Earth's plane of rotation about the Sun).
(the cycle of the seasons; results; from the motion of the Earth around the Sun (and the fact that the Earth's axis of rotation is tilted significantly with respect to the Earth's plane of rotation about the Sun) (the Earth's axis of rotation; is tilted; significantly)
the cycle of the seasons the Earth's axis of rotation
results is tilted
from the motion of the Earth around the Sun (and the fact that the Earth's axis of rotation is tilted significantly with respect to the Earth's plane of rotation about the Sun
significantly