Question

the photograph shows some vacuum packed there is no inside the packet explain why these help the food to keep fresh for a long time.
answer me fast it's urgent
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Answer 1

Answer:

Vacuum packing is a method of packaging that removes air from the package prior to sealing. This method involves (manually or automatically) placing items in a plastic film package, removing air from inside and sealing the package.[1] Shrink film is sometimes used to have a tight fit to the contents. The intent of vacuum packing is usually to remove oxygen from the container to extend the shelf life of foods and, with flexible package forms, to reduce the volume of the contents and package