Which song writing duo is best known for composing many broadway musicals in the 1930s?

Richard Rodgers and Oscar Hammerstein

Explanation:

   American composer Richard Rodgers (1902 - 1979) has written over 900 Broadway songs and forty musicals, as well as film and television soundtracks. He is best known for his partnership with lyricist Oscar Hammerstein (1895 - 1960). Their compositions have had a significant impact on popular music.

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!