An organism at the start of a food chain which provides the total input energy into an ecosystem is the? by Sunday | Nov 18 | Biology WAEC | 0 comments A. sun B. producer C. consumer D. decomposer Correct Answer: Option B B. producer Users Also Read These:During the manufacture of food by plants, which of…In a food chain the position occupied by an organism…In an ecosystem the organism which changes light…The continuity of an ecosystem depends on constant…Which of the following values showing the total…