Answers

2015-12-01T15:36:26+05:30
We refridgerate or heat food to keep it safe it doesnt spoil easily
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2015-12-01T16:37:00+05:30
Many bacteria cannot survive in cold and hot temperature, so we can take advantage of it by storing the things which are attacked by bacterias in hot and cold places. like we keep the food in fridge and we boil and heat food to kill the bacterias present in it.
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