Which model represents how energy flows through an ecosystem with many pathways?

• A. Food chain
• B. Food web
• C. Trophic level
• D. Detritovore

Answer: (B)

Energy flow in ecosystems occurs through many feeding connections, forming a network rather than a single path. A food web captures this complexity by showing all the feeding relationships among producers, consumers, and decomposers, so energy can move through multiple routes and through both grazing and detrital pathways. A food chain, by contrast, is a single, linear sequence of who eats whom and misses the alternative paths energy could follow. A trophic level is simply a rank in the feeding hierarchy (who is primary producer, primary consumer, etc.), not a network of pathways. A detritovore is an organism that feeds on detritus, not a model of energy flow patterns.