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, each stage in the chain is a?In an ecosystem the organism which changes light…The progressive loss of energy at each level in a…During the manufacture of food by plants, which of…The total possible combinations of th input…