Final answer:
Vaslav Nijinsky choreographed the ballet version of Debussy's Prelude to "The Afternoon of a Faun".
Step-by-step explanation:
The Russian dancer who choreographed the ballet version of Debussy's Prelude to "The Afternoon of a Faun" is Vaslav Nijinsky. Nijinsky was a renowned ballet dancer and choreographer who had a significant impact on the development of modern dance. He created the choreography for the ballet in 1912, when he was a principal dancer with the Ballets Russes company.