You are presented with the question "What do refrigerators do?" and the following answer choices: 
- walk dogs
 - lowered energy cost
 - adding heat
 - hold gloves
 - Decrease bodily water
 - make air
 - keep food fresh
 - staying warm

Now knowing that keeping food cold is used for keeping food fresh and refrigerators are suppose to add coldness to the food inside of it, choose the best answer.


 

       keep food fresh  