Why is a food web a better model than a food chain?

• A. A chain is a single linear path; a web shows multiple feeding relationships; a web captures ecosystem complexity
• B. A chain shows all relationships; a web shows none
• C. A chain models energy flow; a web models nutrient cycles
• D. A chain is easier to draw; a web is more complex

Answer: (A)

Feeding relationships in ecosystems form a network, not a single straight line. A food chain follows one simple path from a producer up to top predators, which ignores how many organisms actually eat more than one prey and how predators have choices. A food web shows many interconnected feeding links, revealing how energy can flow through multiple paths and how the actions of one species ripple through the community. This broader view captures complexity, including omnivory and the role of detritivores and decomposers that recycle nutrients, and it helps explain why ecosystems can be more resilient to changes than a single chain would suggest. Hence, a food web is a better model because it represents multiple feeding relationships and the overall network of energy transfer, not just a single linear path.