Question

explain the method of food preservation?​

Answer 1

Among the oldest methods of preservation are drying, refrigeration, and fermentation. Modern methods include canning, pasteurization, freezing, irradiation, and the addition of chemicals

Hope it helps

Answer 2

Food can be preserved in mainly 3 ways:

1.Refrigeration:

We can keep food in refrigerators to extend their consumable time.

Example: Keeping milk in freezer/refrigerator for 2 or more days.

2.Airtight containers:

Spoiling of food happens in presence of air. Air tight containers prevent air from flowing in and spoiling food.

Example: Keeping sweets in airtight containers.

3.Chemical Preservatives:

Adding chemicals like sodium benzoate helps foods like jams and pickles stay unspoiled for extremely long periods of time.

Hope this helps :)