she stands to loose her strength
Mildred believes that there is someone knocking at the door.
Mildred ran to the parlor to hide the presence of the illegal books Montag had been hoarding, as she was afraid of getting into trouble if they were discovered by Captain Beatty.
The final informant on Montag's home in "Fahrenheit 451" was Captain Beatty, his boss at the fire station. Beatty had grown suspicious of Montag's growing interest in books and ultimately turned him in for possessing illegal literature.
Captain Beatty is the primary antagonist in "Fahrenheit the sieve and the sand." As the fire chief, he enforces the ban on books and intellectual freedom in the dystopian society of the novel. Beatty represents the oppressive government that oppresses free thought and individuality.
Captain Beatty drove the Salamander to Montag's house in "Fahrenheit 451." Beatty was aware that Montag had secretly been collecting and hiding books, and he wanted to confront Montag about his subversive actions.
Captain Beatty hints to Montag that he knows about his secret stash of books by subtly referencing specific titles during their conversations. Beatty mentions classics like "Romeo and Juliet," "Julius Caesar," and "David Copperfield," which could indicate his awareness of Montag's illegal activities.
Montag is a round character, we witness his change innerward and outwardly, the fire captain comes across as a round characer. Flat character would be his wife and her friends and the firemen.
Neither Mildred nor Captain Beatty says exactly how Clarisse was killed. We just don't know.
Mildred is concerned that Beatty will burn their entire house to the ground if he finds out they have books, along with the potential consequences that may arise from defying the strict book-banning laws in their society.
Captain Beatty in "Fahrenheit 451" represents the oppressive forces of censorship and control in society. He symbolizes the dangers of a society that suppresses intellectualism and critical thinking in order to maintain power and conformity. Beatty's character serves as a warning against the dangers of censorship and the importance of preserving free thought and the pursuit of knowledge.
because they found books in Montag's house.
First off, Guy doesn't betray Mildred; Mildred betrays Guy (turns him over to the firemen). The reader never sees the interaction between Mildred and the firemen, only Guy's reaction to seeing Mildred (pg 114; or a couple paragraphs into part 3). Montag kills Beatty (pg 119; or about 7 paragraphs into the 2nd break into part 3).