Question

what happens during a compression of a sound wave? the particles that a sound wave passes through are pulled apart. the particles that a sound wave passes through are pressed together. the particles that a sound wave passes through are spread out.

Explanation:

Sound waves are longitudinal waves. In a longitudinal wave, compression is a region where the particles of the medium (through which the sound wave is traveling) are close together or pressed together. When a sound wave passes through a medium, during compression, the particles in that region of the wave are in a state of being pushed towards each other. The other options - "pulled apart" and "spread out" - describe rarefaction (a region in a longitudinal wave where particles are far apart) rather than compression.

Answer:

The particles that a sound wave passes through are pressed together.