Timbre describes all of the aspects of a musical sound that do not have anything to do with the sound's pitch, loudness, or length
Timbre is caused by the fact that each note from a musical instrument is a complex wave containing more than one frequency
The human ear and brain are capable of hearing and appreciating very small variations in timbre
The general sound that one would expect of a type of instrument - a trombone for example - is usually called its timbre or color
Hello, for a goodbye letter tell them what you enjoyed about their class, how they impacted you, and if you’re going to remember anything in particular about them. just be grateful and say thank you and that you will miss them.
The second picture would be correct.
I hope this helps! (: