Final answer:
An example of a human interaction with a longitudinal wave is speaking and listening to sound, where sound waves propagate parallel to the air particle vibration caused by vocal cord movement.
Step-by-step explanation:
An example of a human interaction with a longitudinal wave is speaking and listening to sounds. When a person speaks, their vocal cords vibrate, compressing and expanding the air particles in front of them.
This creates areas of high and low pressure that move parallel to the direction of the sound wave, which is how the sound propagates through the air.
This compression and rarefaction of air particles reaches the listener's ear, causing the eardrum to vibrate in the same direction as the sound wave, allowing the person to hear the sound.