Each food chain is a descriptive diagram including ... Figure 1 shows a simplified food web in a desert ecosystem. In this food web, grasshoppers feed on plants; scorpions prey on grasshoppers ...

They always start with an organism that makes food. The producer. In this example, it's grass. The first consumer in the chain, in this case the grasshopper, is also called the primary consumer.

In the food chain above: the frog is a predator and the grasshopper is its prey the hawk is a predator and the frog is its prey ...