Answer:
Its C
<u>Thank</u><u> </u><u>me</u><u> </u><u>later</u><u> </u>
<u>Now</u><u> </u><u>bye</u><u> </u>
Line the outside of the cup with the tinfoil. Then put the cotton balls inside. Finally, line the cotton balls with the tinfoil and smush it all together.
Answer:
Hey there!
Because you are compressing the spring, these are compressional waves.
Let me know if this helps :)