Are both Benjamin Britten and Claude Debussy music composers ? 
yes
Claude Debussy
Achille-Claude Debussy (] , 22 August 1862 – 25 March 1918), known since the 1890s as Claude-Achille Debussy or Claude Debussy, was a French composer.
 He and Maurice Ravel were the most prominent figures associated with Impressionist music, though Debussy disliked the term when applied to his compositions.
 He was made Chevalier of the Legion of Honour in 1903.
 He was among the most influential composers of the late 19th and early 20th centuries, and his use of non-traditional scales and chromaticism influenced many composers who followed.
Benjamin Britten
Edward Benjamin Britten, Baron Britten {'1': ", '2': ", '3': ", '4': "} (22 November 1913 – 4 December 1976) was an English composer, conductor and pianist.
 He was a central figure of 20th-century British classical music, with a range of works including opera, other vocal music, orchestral and chamber pieces.
 His best-known works include the opera "Peter Grimes" (1945), the "War Requiem" (1962) and the orchestral showpiece "The Young Person's Guide to the Orchestra" (1945).
Curlew River
Curlew River – A Parable for Church Performance (Op. 71) is an English music drama with music by Benjamin Britten to a libretto by William Plomer.
 The first of Britten's three 'Parables for Church Performance', the work is based on the Japanese "noh" play "Sumidagawa" (Sumida River) of Juro Motomasa] (1395–1431), which Britten saw during a visit to Japan and the Far East in early 1956.
 Beyond the "noh" source dramatic material, Britten incorporated elements of "noh" treatment of theatrical time into this composition.
 "Curlew River" marked a departure in style for the remainder of the composer's creative life, paving the way for such works as "Owen Wingrave", "Death in Venice", and the Third String Quartet. Neil Mackie
Neil Mackie (born 1946) is a Scottish tenor.
 During his career as a singer, he was associated with the works of 20th-century composers, particularly Benjamin Britten, and Peter Maxwell Davies.
 He created the title role in Davies's opera "The Martyrdom of St Magnus" and Sandy in his "The Lighthouse" and performed in the world premieres of Davies's "Into the Labyrinth", cantata for tenor and chamber orchestra, and "The Jacobite Rising".
 He has also premiered vocal works by Elliott Carter ("In Sleep, in Thunder"), Hans Werner Henze ("Three Auden Songs") and songs by Benjamin Britten. Ariettes oubliées
Ariettes oubliées ("Forgotten Songs") is a song cycle for voice and piano, L. 60 by Claude Debussy, based on poems by Paul Verlaine.
 The six "arriettes" were composed mostly in Rome in 1886.
 The first two were completed in Paris in March 1887.
 They are dedicated to the singer Mary Garden who also sang Mélisande.
 The poetry of Paul Verlaine had a more profound influence on Claude Debussy's music than did Debussy's closest literary or musical acquaintances. Jeux
Jeux ("Games") is the last work for orchestra written by Claude Debussy.
 Described as a "poème dansé" (literally a "danced poem"), it was originally intended to accompany a ballet and was written for the Ballets Russes of Sergei Diaghilev to choreography by Vaslav Nijinsky.
 Debussy initially objected to the scenario, but reconsidered the commission when Diaghilev doubled the fee.
 Debussy wrote the score quickly, from mid-August to mid-September 1912.
 Robert Orledge has analysed the chronology of Debussy's composition and preserved manuscripts of the score. The Seduction of Claude Debussy
The Seduction of Claude Debussy is a 1999 concept album by Art of Noise, featuring a line-up of Trevor Horn, Anne Dudley, Paul Morley, and Lol Creme.
 Also appearing on the album are John Hurt, soprano Sally Bradshaw, Rakim, and Donna Lewis.
 The group blended the music of French impressionist composer Claude Debussy with drum and bass, opera, hip hop, jazz, and narration, and described the album as "the soundtrack to a film that wasn't made about the life of Claude Debussy." Six épigraphes antiques
Six épigraphes antiques, L. 131, is a suite of six pieces by Claude Debussy, originally written for piano duo.
 Completed in July 1914, the suite was Debussy's only completed composition that year.
 In 1915 Debussy transcribed them for piano solo.
 Much of the music (over 100 measures) is taken from the musical accompaniments he had written in 1901 for his friend Pierre Louÿs's erotic lesbian poems "Les Chansons de Bilitis". Flute, viola and harp
Flute, viola and harp are the instruments of a chamber music grouping that have become common through the establishment of ensembles that feature this set of instruments and have enjoyed new compositions written for the set.
 The first major composition written for the instruments was the Sonata for flute, viola and harp (1915) by Claude Debussy; Debussy had set out to compose a set of chamber works for "diverse ensembles," as distinguished from more common groupings like string quartet or piano trio.
 Though other composers have written chamber works that feature harp, this set of instruments has gained a repertoire, which places it among other established genres of the twentieth century such as the "Pierrot ensemble" (flute, clarinet, piano, violin and cello, with frequently added percussion or voice). Fantaisie for piano and orchestra (Debussy)
"Fantaisie" for piano and orchestra, L. 73, is a composition for piano and orchestra by French composer Claude Debussy.
 It was composed between October 1889 and April 1890 but it received its first public performance only in 1919, a year after Debussy's death, in London by the Royal Philharmonic Orchestra with Alfred Cortot as soloist.
 It is Debussy's only composition for piano and orchestra and, even though it is written in a three movement form, it was not composed as a Piano Concerto.
 Today it is one of Debussy's least frequently performed works.
　This work is dedicated to the pianist René Chansarel, who had been scheduled to play the solo part for the cancelled premiere in 1890.