The prime mover of the system is the sun, whose energy heats the Earth.
(The prime mover of the system; is; the sun, whose energy heats the Earth) (the sun; heats; the Earth) (the sun; is The prime mover of; the system)
The prime mover of the system the sun the sun
is heats is The prime mover of
the sun, whose energy heats the Earth
the Earth
the system