I think one is carbon dioxide not sure what the other is
Doppler effect and redshift as the light coming from stars from the distance can be shifted in the same way as a pitch of sound does
C. To live in a group with other organisms
The addition of acetyl groups to histones is associated with chromatin condensation and and higher levels of gene expression
Answer:
Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.
