Sound is produced by the vibration of an object. When an object vibrates back and forth in air, then the molecules of air close to this object also starts vibrating back and forth with the same frequency. These vibrating air molecules pass on their motion to the next layer of air molecules due to which they also start vibrating back and forth.
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Answer:
Sound is produced by the vibration of an object. When an object vibrates back and forth in air, then the molecules of air close to this object also starts vibrating back and forth with the same frequency. These vibrating air molecules pass on their motion to the next layer of air molecules due to which they also start vibrating back and forth.