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:In a food chain the position occupied by an organism…The position occupied by an organism in food chain is the?Which of the following values showing the total…During the manufacture of food by plants, which of…The total amount of energy entering a food chain is…