When several food chains come together, they are called
an animal chain
a food web
nature
an environmental chain

a food web

Explanation:

nteraction between biotic and abiotic components constitutes an ecosystem. In any ecosystem, energy flows through the food chain. A food chain is a chain of producers and different consumers. In any ecosystem, there are many food chains operate at a time which are interlinked. The network of different food chains operate in an ecosystem is called a food web. In the food web, producers and consumers are interlined. For example, in a grassland ecosystem insects are eaten by frogs and by birds, frogs are eaten by snakes or by birds. Thus, different organisms form the food web among themselves.    

answer; /// the correct )

most community's take hundreds of years to become stable