Final answer:
Aaron Copland composed 'Appalachian Spring' as a ballet score for choreographer Martha Graham. It is a celebrated piece of American classical music, unlike Igor Stravinsky's 'The Rite of Spring' which Stravinsky composed for a different context.
Step-by-step explanation:
“Appalachian Spring” originated as a ballet score for the great modern dancer and choreographer Martha Graham. This work, composed by Aaron Copland, became one of the most iconic pieces of American classical music and is noted for its depiction of rural American themes. While Igor Stravinsky created an equally famous ballet piece, The Rite of Spring, it was Martha Graham who was at the forefront of the creation of “Appalachian Spring”.