what is food chain?

it is a series of organisms depending on others for source of food

A sequence which shows who eats whom and in turn is eaten by whom is called a food chain.
Ex:
Grass is eaten by Rabbit is eaten by Snake is eaten by Eagle.

The process of food transfer from plants through a series of organisms with repeated eating and being eaten is called FOOD CHAIN.Thus,it indicates "Who eats whom"
Example :-   A food chain in grassland is-
                    GRASS-DEER-LION

it is series of oorganism depending other for source food.

Food Chain: is a diagram that shows how food energy moves from one organism to another in a given environment. Food energy moves along the food chain

A food chain is a linear network of links in a food web starting from producer organisms (such as grass or trees which use radiation from the sun to make their food) and ending at apex predator species (like grizzly bears or killer whales), detritivores (like earthworms or woodlice), or decomposer species (such as fungi or bacteria). A food chain also shows how the organisms are related with each other by the food they eat. Each level of a food chain represents a different trophic level. A food chain differs from a food web, because the complex network of different animals' feeding relations are aggregated and the chain only follows a direct, linear pathway of one animal at a time. A common metric used to quantify food web trophic structure is food chain length. In its simplest form, the length of a chain is the number of links between a trophic consumer and the base of the web and the mean chain length of an entire web is the arithmetic average of the lengths of all chains in a food web

 

Food c