Preservation methods are techniques used to maintain the quality and extend the shelf life of food, artifacts, and other items. Common methods include refrigeration, canning, drying, and pickling. These techniques help prevent spoilage and protect against bacteria, mold, and other harmful organisms. In addition to food, preservation methods are also important for cultural heritage. Techniques like climate-controlled storage, conservation treatments, and digitization help protect historical documents, artworks, and artifacts. By using these methods, we can ensure that valuable items remain intact for future generations to study and enjoy.