Those are scales. the highlighted notes (aka the guide tones) are notes in that specific chord that give a harmonic pull towards the next chord. generally they are the 3rd and 7th note (that’s what determines what type of chord it may be: major, minor, major-minor, or dominant). they are the most harmonically important notes in the chord since they determine the quality of the chord itself, so make sure they are in perfect tune.
B is the answer to your question
Hi there!
A t-shirt sounds awesome! Here are a few suggestions:
-a favorite animal
-a meme
-a quote
-an inspirational person
-abstract work
-a piece of your own artwork
-a block design
Hope this helps!! :)
