When sound travels through air, the air particles _____?

جب آواز ہوا سے گزرتی ہے تو ہوا کے ذرات _____؟

Vibrate along the direction of wave propagation

Vibrate perpendicular to the direction of wave propagation

Vibrate but not in any fixed direction

Vibrate and move in a straight line

When sound travels through air, the air particles vibrate back and forth along the direction of wave propagation.
This means that the air particles oscillate in the same direction as the sound wave is traveling.
It allowing the energy of the sound wave to be transmitted through the air.