Final answer:
Spices and many fruits and vegetables have some of the highest benefits of irradiation as they show no degradation in taste or loss of food value or vitamins. However, foods with high water content, like lettuce and peaches, may spoil faster after irradiation.
Step-by-step explanation:
The food that is considered to have some of the highest benefits of irradiation are spices and many fruits and vegetables. These foods have dramatically longer shelf lives and show no degradation in taste or loss of food value or vitamins when subjected to low-level irradiation. However, it is important to note that some foods, such as lettuce and peaches with high water content, may spoil faster after irradiation. High fat content foods, like fatty meats and dairy products, may also experience alterations in taste or smell but can be minimized by using lower doses of radiation at colder temperatures.