The microorganisms presents in the air come into the food and spoiles the food
It depends on the type of food it is
sternels
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It depends on the food. But food and safety laws state dairy should be kept at 40F or below.
You can control the temperature in your refrigerator. Generally the refrigerator is kept at 4 C .
The amount of time a potentially hazardous food is held within the temperature danger zone should kept as short as possible.
It can be kept in a room temperature garage. Not too hot or not too cold or it will sicken and die.
That would depend on the food, "The Danger Zone is 45 to 140°F" Any cold food should be kept below 45, and hot food should be kept above 140 degrees.
Ambient food is food which is kept and served at the same temperature as room temperature. I.e it is food which does not require refrigeration or heating before eating.
It should be kept at room temperature. You can leave it in a closet and that will be fine
For food safety your refrigerator should run at 2 - 5 degrees C, so the water kept in it will be at that temperature.
Hot food must be above the temperature of 135°F or above63°C. Hot holding temperatures may vary according to locality. Check with your local health authorities