It is the flow of sunlight energy and the cycling of air, water, and soil which are responsible for the existence of all life, including ours.
(It; is; the flow of sunlight energy and the cycling of air, water, and soil which are responsible for the existence of all life, including ours) (the flow of sunlight energy and the cycling of air, water, and soil; are; responsible for the existence of all life, including ours)
It the flow of sunlight energy and the cycling of air, water, and soil
is are
the flow of sunlight energy and the cycling of air, water, and soil which are responsible for the existence of all life, including ours
responsible for the existence of all life, including ours