2. through an ecosystem
3. trophic levels.
4. biotic factor
5. scavenger
The food chain represents who eats who in the wild. From unicellular algae to giant blue whales, all living things need food to survive. Each food chain is a potential route for energy and nutrients to follow the ecosystem. For example, grass produces its own food from sunlight. Rabbits eat grass. The
food chain is a linear sequence of organisms in which nutrients and energy move from one organism to another. This happens when one organism consumes another. It begins with the producer's airframe, follows the chain, and ends with the decomposer's airframe.
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