tin
Salt is used to preserve food along with adding taste.
We preserve food because it helps the food last longer
Smoking food adds a unique and complex flavor profile to dishes, enhancing the taste of meats, seafood, and vegetables. It also helps preserve food by extending its shelf life through the smoking process. Additionally, smoking can help tenderize tougher cuts of meat, making them more enjoyable to eat.
It helps us to preserve food and it also is used in your stomik (digestive system):)
Smoking itself does not preserve food. The salting, brining, sugaring, and drying are what act as preservative. The antimicrobial and antioxidant nature of smoking helps in the process, but the act of smoking alone does not keep food safe.
water can not preserve food it attracts mold
It is the study and doing the precess of keeping food away from microorgaism especially pathogens and also to preserve food in conditions in which food did not attacked by microorganism. So it helps in keeping public health.
COPPER
On meat, salt can preserve food.
chocolate
well once you have cooked the food it is ready to it so there is no need to preserve it