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:The continuity of an ecosystem depends on constant…In an ecosystem, the organism which changes light…Ice of mass 50g at 0°C was completely melted by 70%…During the manufacture of food by plants, which of…The total amount of energy entering a food chain is…