Question

what happens to the air in your throat when your vocal cords vibrate back and forth to produce sound?
the air vibrates perpendicular to the vocal cords
the air moves in a circular motion
the air remains still
the air compresses and expands

Explanation:

When vocal cords vibrate, they create a longitudinal wave. In a longitudinal wave, particles (in this case, air particles) move parallel to the direction of wave propagation. This movement causes the air to compress (particles come closer) and expand (particles move apart).

Answer:

The air compresses and expands.