The changing length of it's noon shadow during the course of the year can demonstrate the tilt of the Earth's axis, relative to the orbit - the same tilt which is the very cause of the Seasons.
(The changing length of it; 's; noon shadow; T:during the course of the year) (the same tilt; is; the very cause of the Seasons)
The changing length of it the same tilt
's is
noon shadow T:during the course of the year
the very cause of the Seasons