Y, u, p, o, m, or ano context just pick one...please, oh and free points

This medium typically is made of graphite, a crystalline form of carbon:

This nineeteenth-century painting is an excellent example of the use of color theory. the artist used adjacent dots and dashes of different hues that appear to blend and form new hues when viewed from a distance. which painting is it?

Buddy holly's unique guitar sound was a result of what factor? rbflinn0