Food Chain

A food chain is a sequence that shows how energy and nutrients flow through an ecosystem. It starts with producers (like plants), which make their own food using sunlight.

Then, primary consumers (herbivores) eat the plants, secondary consumers (carnivores or omnivores) eat the herbivores, and tertiary consumers eat the secondary consumers.

At the end, decomposers (like bacteria and fungi) break down dead organisms, returning nutrients to the soil. Each step in a food chain is called a trophic level, and energy is passed along as each organism is eaten by the next.