ice
To keep food cold that needs to be kept cold.
Any tropical fish can get cold. A Betta needs to be kept at around 75F to 80F.
No it is a fish and all fish are cold blooded. It is however tropical in its needs and must be kept above 70F.
A chilled desert is a food that needs to be kept in the fridge and must be cold before you eat it after making it. Usually this is for purposes of keeping it from spoiling.
Pack it in dry ice (carbon dioxide in solid form). Check with your Post Office before you try it, though.
cold
The cold war was never cold nor hot.
by convection current
They spoil
Yes
Yes Koalas are kept in zoos but if its to cold they in indoor closures
If it is a hot food, it needs to be kept above 140 or reheated before eating to above that, probably up to 180 to be safe. If it is meant to be cold, then it should be kept below 40, preferably in the 35 degree range to be safe.