Final answer:
Aaron Copland wrote around three pieces of chamber music, including the Violin Sonata and the Sextet for Clarinet, Piano, and String Quartet.
Step-by-step explanation:
Aaron Copland, an influential American composer, wrote around three pieces of chamber music. Chamber music is typically composed for a small ensemble of instrumentalists, such as a string quartet or a piano trio. Some examples of Copland's chamber music include his Violin Sonata and the Sextet for Clarinet, Piano, and String Quartet.
Throughout his career, Copland wrote approximately 20 pieces of chamber music, each varying in instrumentation and style. These pieces include the Piano Quartet, Two Pieces for String Quartet, Vitebsk, Sextet, and the Piano Trio, among others.