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 total amount of energy entering a food chain is…The total possible combinations of th input…The position occupied by an organism in food chain is the?In a food chain, each stage in the chain is a?