The answer to this question is A my friend I hope this helps yah
D because it has the lowest wavelength, meaning the wave is the longest. Its crest are more spaced out creating lower energy. The smaller distance between the crests equals the higher the sound. Creating higher energy.
I am 95% sure this is right. Very sorry if it isn't.
Hope it helps. ;3
They bounce off just like sun rays when they heat the atmosphere they bounce off reflection
