The addition of sugar and salt to the food material result in the increase in the osmotic pressure, which help to destroy the bacteria and help in the preservation of food.
Explanation:
addition of salt or sugar help to preserve food because
by adding salt to the food material it absorbs the water and high concentration of salt inhibit the growth of microbe and if the water is not present in food bacteria will not able to reproduce by this way addition of salt help in the preservation of food.
by adding sugar to the food material it reduces the water content which prevent the food from microbial spoilage.if the sugar concentration is high ,the bacteria to lose water and if enough water is not present bacteria will not able to grow
thus by this way addition of salt or sugar help preserve food.
