It is The art of producing decorative handwriting or lettering with a pen or brush, it was used on many occasions to write important letters and sayings.
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.
Polyphonic music uses two or more independent melodies and monophonic music uses one melody.
A: True, Scat is a form of jazz that is improvised and uses sounds instead of words.