It begins with the trees&#146; biological drive for sunlight and the energy it provides for photosynthesis, the power behind their growth and reproduction.
(It; begins; with the trees&#146; biological drive for sunlight and the energy) (it; provides; for photosynthesis; the power behind their growth and reproduction)
It it
begins provides
with the trees&#146 biological drive for sunlight and the energy
for photosynthesis the power behind their growth and reproduction