One year is the unit of time it takes for the earth to complete an orbit of the Sun.
(One year; is; the unit of time it takes) (the unit of time; takes; for the earth to complete an orbit of the Sun) (the earth; to complete; an orbit of the Sun)
One year the unit of time the earth
is takes to complete
the unit of time it takes
for the earth to complete an orbit of the Sun
an orbit of the Sun