A food web is a complex network of interconnected food chains that illustrates how energy and nutrients flow through an ecosystem. It shows the relationships between different organisms, including producers, consumers, and decomposers. For example, plants convert sunlight into energy, which is then consumed by herbivores, and in turn, those herbivores may be eaten by carnivores. In a food web, each organism plays a specific role, contributing to the balance of the ecosystem. If one species is removed, it can affect many others, highlighting the importance of biodiversity. Understanding food webs helps scientists and conservationists protect ecosystems and maintain their health.