When there is an abundance of certain fruits or vegetables from trees etc (i.e. peaches, apples, zuccini), it is a good idea to preserve them so there is no waste. Preserved foods also suppliment the monthly food bill. They also come in handy especially in times of emergency.
to preserve food and medicines
Water doesn't necessarily preserve food. However, the canning process can preserve food. The boiling process can prevent any transfer of bacteria, fungus or microbes.
they used to cut a hole in the ice and store the food like a refrigerator.
I preserve it by fridge or a freezer or maybe a container that is strong to preserve things. Alot of items are used for preserving
Sour food items will react to the metal and spoil faster.
You can smoke or dry food to store it.
There are many ways to preserve food like putting it in the fridge that slow down the bacteria process,by proper packaging the germs will not enter the food,by drying food etc
Organic substances such as food, cloth, leather and wood.
Astronauts store their food in specially designed packages, such as pouches or cans, that are sealed to prevent leaks and preserve freshness. The food is often dehydrated or freeze-dried to reduce weight and volume. Some items may require rehydration using recycled water aboard the spacecraft before consumption.
The best type of food preservation is by drying. The shelf life of the food is increased by several months, or even by several years, by dehydration. The other way to preserve food is by canning, which is a hydrated way to preserve. If the process is done completely sanitary, then the food will preserve indefinitely.
perishables
Unless you have a steady supply of food all year round, you have to store food when you can get it to have something to eat when the food isn't growing.