Brines, cures, and marinades are used to preserve foods, enhance flavor, and protect shelf life. Curing involves dehydrating meat through dry curing or brine curing to preserve it. The main ingredient in curing is salt, which inhibits bacteria growth and adds flavor. Sugar, herbs, and spices can be added to counteract harsh saltiness and modify flavor. Dry cures involve mixing ingredients and coating foods, while brines moisturize and tenderize by soaking foods in saltwater solutions. Marinades soak foods in seasoned liquids to flavor, tenderize using acid, and add moisture for preservation. They contain oils, acids, aromatics, and seasonings.