Answer the following question given this paragraph: 

Have you ever eaten blue cheese? Do you know what makes it blue? You guessed it. A fungus. For certain types of cheeses, producers add fungal spores to milk curds to promote the growth of mold, which makes the cheese blue. Molds used in cheese production are safe for humans to eat.


Q: What makes blue cheese blue?

 Choices:

- mites

- rot

- rennit

- fungus

A:
fungus
