Question

What is a food chain?
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An interaction where one organism kills and eats another organism
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A one-way model that shows how food resources are exchanged between living things
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A model that represents all the feeding relationships within a community of organisms
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A model that shows specifically how energy moves through living things

Answer 1

A food chain is primarily defined as "a one-way model that shows how food resources are exchanged between living things." It illustrates the linear sequence of organisms through which nutrients and energy pass as one organism eats another. Each step in the food chain is known as a trophic level, and it highlights the flow of energy from producers (like plants) to various levels of consumers (like herbivores and carnivores).