Which statement correctly contrasts a food chain and a food web?

Which statement correctly contrasts a food chain and a food web?

• A. A food chain shows a single energy pathway, while a food web shows many interconnected feeding relationships.
• B. A food chain shows many interconnected feeding relationships; a food web shows a single energy pathway.
• C. A food chain ignores energy flow.
• D. A food web includes decomposers; a food chain does not.

Answer: (A)

Understanding how energy moves through ecosystems helps distinguish simple versus complex representations. A food chain is a single, linear sequence of organisms showing one path energy can take from producers up to top consumers. It traces a single pathway of energy transfer through the ecosystem. A food web, on the other hand, is a complex network of many interconnected feeding relationships. Organisms often have multiple prey and predators, so energy can flow along multiple routes rather than just one line. This interconnectedness makes a web a more realistic depiction of how ecosystems function and helps explain how energy flow and stability can persist even if one species changes. The other statements fall short because a chain does not ignore energy flow—it still involves energy transfer, just along one path—and a web’s defining feature is its many connections, not solely the presence or absence of decomposers.

Understanding how energy moves through ecosystems helps distinguish simple versus complex representations. A food chain is a single, linear sequence of organisms showing one path energy can take from producers up to top consumers. It traces a single pathway of energy transfer through the ecosystem. A food web, on the other hand, is a complex network of many interconnected feeding relationships. Organisms often have multiple prey and predators, so energy can flow along multiple routes rather than just one line. This interconnectedness makes a web a more realistic depiction of how ecosystems function and helps explain how energy flow and stability can persist even if one species changes. The other statements fall short because a chain does not ignore energy flow—it still involves energy transfer, just along one path—and a web’s defining feature is its many connections, not solely the presence or absence of decomposers.