Question

How does the addition of salt or sugar to food kill bacteria and prevent food spoilage?​

Answer 1

Answer:

because salt act as a preservative

Answer 2

The bacteria ferment sugars in the food to form lactic acid, which then prevents the growth of food poisoning bacteria and moulds. The amount of salt added controls the type and rate of the fermentation. If 2-5% salt is used, the fermentation is carried out by a series of bacteria that produce lactic acid.