Final answer:
Aaron Copland composed in three genres: orchestral, ballet, and film. Examples of his compositions include "Appalachian Spring," "Rodeo," and the score for the movie "The Heiress."
Step-by-step explanation:
Aaron Copland composed music in three genres: orchestral, ballet, and film. In the orchestral genre, one of his notable compositions is "Appalachian Spring." It is a ballet suite that beautifully captures the spirit of the American landscape and is one of Copland's most iconic works. In the ballet genre, Copland's composition "Rodeo" stands out, as it showcases his ability to infuse classical music with elements of American folk tradition. Lastly, in the film genre, Copland composed the score for the movie "The Heiress," which demonstrates his skill in creating music that enhances narrative storytelling.