This is due to the fact that the northern hemisphere is tilted away from the sun, and so covers only a small part of the sunlit side of the Earth.
(This; is; due to the fact that the northern hemisphere is tilted away from the sun, and so covers only a small part of the sunlit side of the Earth) (the northern hemisphere; is tilted; away from the sun) (so; covers; only a small part of the sunlit side of the Earth)
This the northern hemisphere so
is is tilted covers
due to the fact that the northern hemisphere is tilted away from the sun, and so covers only a small part of the sunlit side of the Earth
away from the sun
only a small part of the sunlit side of the Earth