Question

are preserved by the use
of oil and vinegar.​

Answer 1

Answer:

pickles are preserved by the use of oil and vinegar.....

Answer 2

Answer:

Use of oil and vinegar prevents spoilage of pickles because bacteria cannot live in such an environment. Vegetables, fruits, fish and meat are often preserved by this method.

----------- are preserved by the use of oil and vinegar.

The dash can be pickles, vegetables, meat, fish,etc.