who composed the music score for the motion picture?
The soundtrack was composed by Clint Mansell. The string quartet arrangements were composed by David Lang.
Requiem for a Dream
The soundtrack was composed by Clint Mansell. The string quartet arrangements were written by Pulitzer Prize-winning composer David Lang, and was performed by the Kronos Quartet. 
what happens to marion in requiem for a dream UNANSWERABLE what is requiem for a dream all about? It is a film that depicts four characters affected by drug addiction and how it alters their physical and emotional state. Their addictions cause them to become imprisoned in a world of delusion and desperation. As the film progresses, each character deteriorates, and their reality is overtaken by delusion, resulting in catastrophe. who directed it? Darren Aronofsky is this film based on a true story? No, it is based on the 1978 novel of the same name by "Hubert Selby Jr.". what are the names of the characters featured in this film? "Sara Goldfarb”, “Harry”, “Marion” and “Tyrone” are some of them. what are the names of the actors playing the roles of the above-mentioned characters? "Sara Goldfarb - Ellen Burstyn”, "Harry - Jared Leto”, "Marion - Jennifer Connelly” and "Marlon Wayans - Tyrone”. what are the names of the places where it was filmed at? In and around Coney Island including the boardwalk, amusement parks and Brighton Beach.
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Requiem for a Dream [SEP] Soundtrack
The soundtrack was composed by Clint Mansell. The string quartet arrangements were written by Pulitzer Prize-winning composer David Lang, and was performed by the Kronos Quartet. The soundtrack was re-released with the album "Requiem for a Dream: Remixed", which contains remixes of the music by various artists including Paul Oakenfold, Josh Wink, Jagz Kooner, and Delerium. The track "Lux Aeterna" is an orchestral composition by Mansell, the leitmotif of "Requiem for a Dream", and the penultimate piece in the film's soundtrack. The popularity of this piece led to its use in popular culture outside the film, in film and teaser trailers, and with multiple remixes and remakes by other producers.