Fact 1: Killing microorganisms in food can be used to extend the shelf life of that food.

Fact 2: Irradiation kills microorganisms that spoil food.

Given the two facts above, answer the question "What can irradiation do?" with the following options: 
- Plant growth is reduced
 - make food glow
 - make food unsafe
 - harm consumers
 - depress neuronal excitability
 - extend the shelf life of food
 - major threat to health
 - prevent heat loss


 

      extend the shelf life of food   