Final answer:
A food web is a complex network of interconnected food chains and feeding relationships, offering a more holistic and accurate depiction of an ecosystem's energy and matter flow compared to a food chain.
Step-by-step explanation:
A complex network of many interconnected food chains and feeding relationships is known as a food web. Food webs represent multiple pathways through which energy and matter flow within an ecosystem and covers the complex and multilevel interactions between organisms. Unlike the simpler, linear model of a food chain, a food web offers a more holistic and accurate depiction of the feeding relationships, capturing the reality that some organisms may feed on species from various trophic levels and can themselves be prey for multiple other species.
In summary, the answer to the student's question is: b) Food Web