Fact 1: Dehydrating food is used for preserving food.

Fact 2: Our Nesco Food Dehydrators require no tray rotation due to a patented air flow system.

Given the two facts above, answer the question "What is used to preserve food?" with the following options: 
- evaporation
 - Something from Nesco
 - white vinegar
 - Calcium carbonate
 - salt and water.
 - layers of fat
 - Exfoliation
 - adding heat


 

  Something from Nesco       