(Primary producers are organisms which form the base of our food web, providing energy for higher trophic levels.)
(Primary producers; are; organisms which form the base of our food web) (organisms; form; the base of our food web) (Primary producers; providing; energy; for higher trophic levels)
Primary producers organisms Primary producers
are form providing
organisms which form the base of our food web
the base of our food web
energy for higher trophic levels