Question

What methods of preservation are there?

Answer 1

there r many ways of preservation:-
1.Adding salt
2.Adding sugar
3.Adding oil
4.Adding preservatives and storing in cool location
5.Adding of Nitrogen gas while packing packets of different things
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Answer 2

Method for preservation of food are as follows:
1. Keep food in air tight container.
2. Add preservatives like salt i food to store for long period.
3. Add vinegar ti the pickle as to preserve it.
4. Nitogen and helium like gases are used to pack snaks.