Which of the following is an example of a dehydrated product?

Beef jerky is indeed an example of a dehydrated product. Dehydration is a preservation method that involves removing moisture from food to inhibit the growth of bacteria, yeast, and molds, which can spoil food. During the jerky-making process, fresh meat is sliced and then seasoned before undergoing a drying process that significantly reduces its water content. This not only enhances its shelf life but also concentrates its flavors, making it a popular snack.

Fresh apples, while they can be made into dehydrated apple slices, are not dehydrated in their fresh state. Frozen vegetables are preserved by freezing, which retains moisture rather than removing it. Pickled cucumbers are preserved through brining in a vinegar solution, which also does not involve dehydration but rather involves fermentation or pickling for preservation. Thus, beef jerky stands out as the clear example of a dehydrated product among the options provided.