Drying is a common method for preserving food and other products by removing moisture from them. This process helps to prevent the growth of bacteria, mold, and other microorganisms that can spoil the product. Drying can be done using various methods such as air drying, sun drying, oven drying, freeze drying, and spray drying. Additionally, research in drying focuses on optimizing drying techniques to improve the quality, shelf life, and energy efficiency of the dried products. This area of research is important in various industries including food processing, pharmaceuticals, textiles, and agriculture.