is a printmaking technique from the beginning of the 18th Century used for the reproduction of red or brown chalk drawings. a.
Chalk
c.
Charcoal
b.
Pencil
d.
Crayon

the string with the finger instead of using the bow

the answer is counterpoint.

counterpoint definition: "the art or technique of playing a melody or melodies in conjunction with another, according to fixed rules."

counterpoint is present in a lot of baroque music- such as bach (notably his wtc prelude and fugues) and scarlatti, but can also be found in music by mozart, beethoven. it can even be found in music as modern as john williams!