A food chain is a series of organisms that transfer food between the trophic levels of an ecosystem. The above picture is an example of a food chain. There are many other animals and birds that catch and eat rabbits, so a trophic pyramid has many food chains. Together these food chains form a food web . A food web is a network of food chains representing the organisms in an ecosystem.
Plants capture and keep energy from the sun in food molecules.
Plants are the base of the food chain. Heterotrophs eat autotrophs to get energy. Lemmings are herbivorous heterotrophs and eat plants that grow in the tundra in northern Alaska. The foxes, owls, weasels, and jaegers eat lemmings. The following sites are more sites like mine.