Dehydration works by applying heat to remove moisture from food over an extended period. This can be achieved through sun drying, air drying, or using a food dehydrator. The process is simpler and more cost-effective compared to freeze-drying. Freeze-drying, on the other hand, involves freezing the food and then lowering the surrounding pressure, allowing the ice in the food to sublimate directly into vapor. This method requires specialized equipment and is more complex, making it more costly...