What is art criticism.

The following:

Explanation:

Art criticism is the discussion or evaluation of visual art. Art critics usually criticize art in the context of aesthetics or the theory of beauty. ... Artists usually need positive opinions from critics for their work to be viewed and purchased; unfortunately for the artists, only later generations may understand it.

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!