Salt certainly does. Prior to refrigeration, salt, smoking and drying of foods were the only known preservation methods. The role of sugar in preserving food is much more dubious.
High-salt and high-sugar mixtures preserve food because they are absorbent relative to the internal fluid of microorganisms, causing them to shrivel up and eventually die. When a layer of a high-salt...
Table salt is Sodium Chloride (NaCl), and while NaCl is found in salt water, there are many other salts and minerals found in it also. While some people do use actual sea salt, or sometimes just...