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%…During the manufacture of food by plants, which of…The total possible combinations of th input…In an ecosystem, the organism which changes light…The position occupied by an organism in food chain is the?