Question

mention any three signification of a food chain.
OR
why there is a progressive decline in the amount of energy at each trophic level?

Answer 1

I hope it helps you

Answer 2

the length and the complexity of food chain very greatly organ is generally eaten by two or more than kind of organism which is done or eaten by several other organism so exceeds of a straight line force in the relation can be shown as a series of branching lines called a food chain