bach was a master of which form?\nintermedi\nopera\nsymphony\nfugue

Brief Explanations:

Johann Sebastian Bach was renowned for his mastery of the fugue. A fugue is a contrapuntal composition where a short melody or phrase (the subject) is introduced by one part and successively taken up by others. Bach's The Well - Tempered Clavier contains numerous fugues. Intermedi were short entertainments in the Renaissance, opera is a dramatic work set to music with singing, and symphony is a large - scale orchestral work (Bach's contributions to symphony were not as central as his fugue work).

Answer:

fugue