Final answer:
Pizza cheese stored in the freezer can be good for a long time if kept at a temperature below 18 degrees C (0 degrees F). Freezing slows down bacterial growth and preserves the cheese's quality. Thaw it slowly in the refrigerator or quickly using the microwave or cool water.
Step-by-step explanation:
The pizza cheese in an unopened package, stored in the freezer, can be good for a long time if kept at a temperature below 18 degrees C (0 degrees F). Freezing food slows down the growth of bacteria and preserves the quality of the cheese. However, it is important to note that freezing does not kill microbes, so when thawing the cheese, it should be done slowly in the refrigerator or quickly using the microwave or cool water.