C. Solids have a definite shape and definite volume.
is the correct one.
low density, malleable, easy to form into shapes, not very chem reactive
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
