Final answer:
A food chain is a sequence of organisms that shows the flow of energy and nutrients in an ecosystem. It starts with a green plant as the producer and goes through different levels of consumers, ending with the top predator. Decomposers help recycle nutrients.
Step-by-step explanation:
A food chain is a sequence of organisms that shows the flow of energy and nutrients from one organism to another in an ecosystem. It starts with a producer, which is usually a green plant that can make its own food through photosynthesis. The producer is then eaten by a primary consumer, which is an herbivore that feeds on plants. The primary consumer may be eaten by a secondary consumer, which can be either a carnivore that feeds on herbivores or an omnivore that eats both plants and animals. The energy flow continues through the food chain, with each organism being consumed by a higher-level consumer until it reaches the top predator. Decomposers, such as bacteria and fungi, play an important role in breaking down dead organisms and recycling nutrients back into the ecosystem.
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