How many food chain are in this diagram?

Here are the food chains in the diagram:

1. VEGETATION $\rightarrow$ GRASSHOPPER $\rightarrow$ LIZARD $\rightarrow$ HANK
2. VEGETATION $\rightarrow$ RABBIT $\rightarrow$ HANK
3. VEGETATION $\rightarrow$ MOUSE $\rightarrow$ HANK
4. VEGETATION $\rightarrow$ MOUSE $\rightarrow$ SNAKE $\rightarrow$ HANK

There are a total of 4 food chains in the diagram.

The final answer is $\text{4}$.