Final answer:
A food web illustrates the complex and multiple feeding relationships within an ecosystem, contrasting with the simplified, linear relationships shown in a food chain.
Step-by-step explanation:
A food web reveals complex interactions and multiple pathways of energy transfer within an ecosystem that a food chain does not. The correct answer to the student's question is B: A food web shows that most organisms consume and are consumed by more than one organism, which provides a more holistic understanding of the ecosystem. In contrast, a food chain shows a singular, linear pathway of energy transfer, and while it is easier to understand and can be used to model energy flow, it does not represent the diversity of feeding relationships in the ecosystem as well as a food web does.