Answer:
The most significant difference between Truffaut's adaptation and the novel is that the film portrays Montag and Clarisse falling in love, and Montag helps Clarisse escape the firemen unharmed.
"Today nobody brought his or her instrument" is correct. It is common for people to use "their" in a sentence like this, but "his or her" is the more proper term.
If I am correct then the blank should be filled in with " climate front atmosphere" Not sure if this is correct but, hope this helped! :)
Both are sweet and more gentle than the rest of the gang. Ponyboy is much softer btw I love the book the outsiders
