DefinitionA food chain is a sequence of feeding relationships between organisms within an ecosystem; it is the energy flow from one trophic level to another. A food chain shows how each organism receives food and how the energy and nutrients are passed from species to species.
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explanationThere are three factors shown above in this food chain. The chain first starts off with a white oak tree, which is a producer. The leaves of the tree undergo the process of photosynthesis by using the sunlight from the sun and other resources such as water to produce glucose. The oak tree produces acorns, which is what the squirrel eats. The squirrel is able to gain energy by eating the nut of the tree. Its predator, an owl, is able to gain energy once it eats its prey, the squirrel. Overall, this chain shows how energy is being passed from the factors in the ecosystem - from the tree, to the squirrel, and lastly, to the owl.
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