Final answer:
The opening theme of Stravinsky's The Rite of Spring is played by the bassoon in a high register, showcasing Stravinsky's innovative use of orchestral instruments.
Step-by-step explanation:
The opening theme of Stravinsky's The Rite of Spring is played by the bassoon in a high register. Igor Stravinsky's work is known for its revolutionary impact on modern classical music. The Rite of Spring is particularly famous for its avant-garde approach and for causing a scandal at its premiere in 1913 due to its unconventional music and choreography. The choice of the bassoon, an instrument typically associated with lower pitches, playing in such a high register was part of what made Stravinsky's composition so groundbreaking.