The complex feeding relationships among a number of different organisms make up the food web.

Here's why:

* Food web: A food web is a complex network of interconnected food chains. It shows the flow of energy and nutrients through an ecosystem by illustrating how different organisms consume and are consumed by each other.

* Food chain: A food chain is a linear sequence of organisms, each of which consumes the one below it. For example, grass → grasshopper → frog → snake.

Let me know if you have any more questions about ecosystems or food webs!