Final answer:
Arnold Schoenberg, an Austrian composer known for his innovative work in atonality and twelve-tone scale, moved to the United States in 1933 and taught at UCLA, among other institutions.
Step-by-step explanation:
The Austrian composer Arnold Schoenberg moved to the United States in 1933 due to the growth of Fascism in Europe which led many immigrant artists to seek refuge in America. Schoenberg's major innovations in the field of music included his experiments with atonality and the creation of a twelve-tone scale, which challenged the traditional scales used in Western music since the Renaissance, offering a new perspective in avant-garde music. He taught at several institutions, including the University of California, Los Angeles (UCLA), where he influenced a generation of composers with his radical ideas.