The arts is a broad subdivision of culture, composed of many expressive disciplines. In modern usage, it is a term broader than "art", which usually means the visual arts (comprising both fine art, decorative art, and crafts). The arts encompasses visual arts, performing arts, language arts, and culinary arts. Many artistic disciplines involve aspects of the various arts, so the definitions of these terms overlap to some degree.
en.wikipedia.org/wiki/Arts
Counterpoint is a very general feature of music (especially prominent in much Western music) whereby two or more melodic strands occur simultaneously in separate voices, either literally or metaphorically (if the music is instrumental).
en.wikipedia.org/wiki/Counterpoint