Here's why:

* Food chains show a linear path of energy flow from one organism to another. They are simplified and don't capture the complex interactions within an ecosystem.

* Food webs are a more accurate representation. They depict the interconnected feeding relationships between multiple organisms, showing how energy flows through the entire ecosystem. They illustrate:

* Multiple food sources: Organisms can have more than one prey item.

* Predator-prey interactions: Multiple predators can feed on the same prey.

* Competition: Organisms can compete for the same food sources.

Food webs offer a better understanding of how ecosystems function and how changes in one population can affect others.