Who was the composer known for being one of the first to write music for films?

Camille Saint-Saëns is recognized as one of the first composers to create music specifically for films, notably in relation to the 1911 silent film "The Assassination of the Duke of Guise." His innovative approach included composing original scores that enhanced the narrative and emotional impact of the films. This development marked an important evolution in the relationship between music and cinema, setting a precedent for future film scoring.

The other composers mentioned are not primarily known for their contributions to film music in the way Saint-Saëns is. Claude Debussy, while a significant figure in classical music, focused predominantly on orchestral and piano compositions, without specifically writing for the film medium. Igor Stravinsky is celebrated for his groundbreaking compositions in the early 20th century but also did not compose for film. Wolfgang Amadeus Mozart, renowned for his operas, symphonies, and chamber music, lived long before the advent of film and therefore did not contribute to film music. Saint-Saëns stands out in this context for his pioneering contributions to film scoring.