Food chain is an ecosystem is a chain of organisms through one organism secures food by eating another organism, by consuming animals. Such food chains are different types such as – grazing food chain parasitic food chain saprophytic food chain. Grazing food chain ate very common. It starts from plants and goes from smaller to larger grazing animals, cow or goat or rabbit. The parasitic food chain is executed through parasites and scavenges. However some of the parasitic food-chain may be complex enough with organism not related. This parasitic food chain goes from large organism to smaller ones without killing as in the case of predator. The saprophyte food chain involves organic matter with ecosystem. It begins with dead organic matter and passes to micro-organism and then predators.