Last summer, Lorraine's garden yielded more food than her family could eat. She chose to extend the life of many of her fruits and vegetables by preserving them. What do most preservation methods have in common?

Most preservation methods cannot completely eliminate spoilage phenomena indefinitely.

Explanation:

There are many different types of preservation methods. They inclue things like dehydration, smoking, fermentation, salting, sweetening, canning, freezing, ultra high temperature, and irradation. Although some of these change food integrity, others maintain it. However, no method of preservation can preserve food indefinitely.