A food web is a model that shows the feeding relationships among organisms in an ecosystem. It includes:

* Producers: Organisms that make their own food through photosynthesis (like plants).

* Consumers: Organisms that eat other organisms (like herbivores, carnivores, and omnivores).

* Decomposers: Organisms that break down dead organisms and waste (like bacteria and fungi).

The arrows in a food web show the direction of energy flow, from the producers to the consumers.

Let me know if you'd like more details about food webs!