Explanation:
For example, when a drum is struck, the flexible skin (sometimes called a membrane) of the drum vibrates. The compression and expansion of the air on either side of the vibrating membrane produces differences in air pressure. The pressure differences generate a sound wave that propagates outward from the drum surface.
Answer:
Sorry I don't know the answer .Hope other help you.sorryyyyyyyy
The correct answer is D, Diamond
<em>Its B fam, hope you get that good grade.</em>
