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:Ice of mass 50g at 0°C was completely melted by 70%…The position occupied by an organism in food chain is the?P → Q → R → S → T. The organism designated P in the…The total possible combinations of th input…In an ecosystem, the organism which changes light…