Arefrigerator is used for keeping food fresh for a long period of time, and air, heat and light cause dried food to spoil. Given these facts, a working refrigerator is good protection from what among the following options:
- Electric devices
 - plastic
 - Abnormal cell growth
 - darkness
 - Temperature changing
 - a pathogens
 - air, light and heat
 - cold


 

       air, light and heat  