Food chain:-
A food chain is a pathway that represents the exchange of energy from one organism to another. In other words, it is the chronological order of who eats whom in a biological community. Food chains go hand-in-hand with food webs, though there are differences between the two. While a food chain is a single pathway of energy transfer, a food web shows all of the different relationships or possible energy transfers between a selected group of species.
A food chain is a linear network of links in a food web starting from producer organisms and ending at apex predator species, detritivores, or decomposer species.