→ Living organisms depend on each other for their food requirement and form a chain which is termed as food chain.
→ A food chain describes how energy and nutrients move through an ecosystem.
→ However, the trophic inter-relationship between animals in nature cannot be explained as simple food chains only.
→ Among the various ecosystems, each one is having definite food chain.
→ The individuals involved are also linked with. food chains of other ecosystem.
→ In this way, the animals are inter-dependent for food and they form a net which is termed as a food web.