Explanation:

- Option 1: was; in

- "Was" is incorrect because it is a past tense verb, and the sentence refers to a general truth or ongoing situation about the vibrations from wind instruments.

- "In" is not the correct preposition since it does not grammatically fit in this context.

- Option 2: are; for

- "Are" correctly matches the present tense usage for the ongoing effects of vibrations from wind instruments.

- "For" is the suitable preposition to express benefits related to breathing and health.

- Option 3: is; in

- "Is" is incorrect because it is singular and does not agree with the plural subject "vibrations."

- "In" is not the appropriate preposition in this context.

- Option 4: were; to

- "Were" is incorrect as it is past tense, while the sentence calls for a present context.

- "To" does not correctly match the sentence's intended meaning.