Which tool creates a vector path that can be converted into smooth-edged selections?

Pen Tool

Explanation: In graphics software, the pen tool is frequently used in the creation of smooth-edged selections, but is not a type of selection tool. The Pen Tool creates vector paths that can be converted into selections that in turn can be used to extract or mask groups of pixels.

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!