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The answer is letter B.

Preservatives
are added to food to prevent its spoilage and to increase its shelf life. In
our society, food is one of the
many products that contain preservatives. You can also find them in medicines,
paints, cosmetics, wood, among others. This is commonly done to prevent decay
caused by microbial growth or chemical changes. It comes in two modes called
chemical and physical preservation. Chemical preservation is when chemical
compounds are added to products, like the one we find in a lot of foods.
Physical preservation involves processing techniques like dehydration, freeze
drying, and refrigeration.

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