Food web is constituted by
(a) Various interlinked food chains in a community
(b) Relationship between animals and plants
(c) Relationship between organisms and their environment
(d) Relationship between animals, plants, and microbes

Hint: The linkages in a food web represent the feeding pathways, such as where heterotrophs get organic matter by feeding on autotrophs and other heterotrophs. Another name of the food web is the food cycle (consumer-resource system).

Complete answer:
A food chain is a series of plants or animals which are interrelated within the sort of organism being eaten as food by the other. The Food Web is constituted by various interlinked and interdependent food chains during a community. It’s also called a consumer-resource system. The ecosystem consists of living organisms and their abiotic environment.
There are different types of food webs which are: Source web - one or more nodes, all of their predators, all the food these predators eat, and so on. Sink web - one or more nodes, every one of the prey, all the food that these prey eat, and others. Community web - a gaggle of nodes and every one the connections of who eats whom. Energy flow web - specify variability of energy between nodes beside links between a resource and a consumer. Paleoecological web - an internet that reconstructs ecosystems from the fossil record. Functional web- emphasizes the functional significance of certain connections having strong force and greater respect to a community organization, more so than energy flow pathways. So, the correct answer is ‘(a) Various interlinked food chains in a community.'

Note: Food webs are necessarily aggregated and only illustrate a small portion of the complexity of real ecosystems. For instance, the number of species on the earth is likely within the general order of 10 power 7. Over 95 percent of those species contain microbes and invertebrates, and comparatively, few are named or classified by taxonomists.