A refrigerator is used for keeping food fresh for a long period of time.
To prevent bacterial food poisoning, the basic rule is to keep hot foods hot and cold foods cold.
Refrigerators help prevent cold food from growing poisonous bacteria.
What prevents cold food from growing poisonous bacteria?
Options:
Dehydration
Cooking
a hydraulic system
sweating
refrigerators
fur and fat
an electric stove
hard outer covering