Question

Why did clarisse McClellan die in the book Fahrenheit 451???

Answer 1

 Clarisse dies (i think). It could be that, in this world, a girl like Clarisse just can’t exist. She’s incompatible with her surroundings, so she’s not allowed to live. I don’t know all the details of her demise, or is the confusion reconciled by the end of the novel. But I can’t help but think of Clarisse when Granger discusses the thumbprint on his mind left by his grandfather. Even after her disappearance/death, Clarisse continues to affect Montag. She exists because she changed his mind, where as someone like Mildred hardly existed at all.

Answer 2

The book, Fahrenheit 451, never says if she died or not, but Montag is led to believe she was hit by a car that was street racing. In the play, she's with the hobos at the end. In the book it is said that Clarisse is hit by a moving car and dies. Montag gets this information from his wife Mildred, and is deeply saddened although the information may not be true. In a later, afterward edition she was killed in a car accident

Hope I helped!