This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
By following ways food can be presrved :- keeping food in closed & air thight containers
2.keeping food grade plastic utensils.
3.preserving food in refridgerator. pickles putting salt & oil in excess.
by keeping them in refrigerators and keeping it away from sunlight
We can preserve food in many ways .some of them are:
(i)keeping the food in air tight vessels and containers,
(ii)packing the food in oxygen free bags,
(iii)by adding preservatives,
(iv)storing in oxygen free stores,etc.