What A Differentiate A Food Chain From A Food Web?

In reality a food web is to be considered as a many food chains interconnecting and having some sort of relation with each other. in a food web there can be variations of predators to the same animal.
For example, grass is eaten by grasshopper which is then eaten by a swallow which is also eaten by a hawk.- thats a food chain. A food web however may change the course of things by stating that the grasshopper is eaten by a frog.