Killing microorganisms in food can be used to extend the shelf life of that food, and irradiation kills microorganisms that spoil food. Given these facts, doing what to food can extend shelf life by removing microorganisms among the following options:
- warming
 - Dehydration
 - cooling
 - Cooking
 - bacteria
 - burning
 - irradiating
 - hydration


 

       irradiating  