Mention any two principles on which the method of food preservation are based

Answer 1

The two principles on which the method of food preservation is based are:

1. Removal of moisture: Many methods of food preservation involve removing or reducing the moisture content of food. By doing so, the growth of microorganisms that cause food spoilage is inhibited. Examples of techniques based on this principle include drying, freezing, and dehydration.

2. Inhibition of microbial growth: Another principle of food preservation is to inhibit or prevent the growth of microorganisms that cause food spoilage. This can be achieved through various methods such as adding preservatives (like salt, sugar, vinegar, or artificial additives), using high temperatures (e.g., pasteurization or sterilization), or applying techniques like fermentation or pickling. These methods create conditions that are unfavorable for the growth of microbes, thus preserving the food.