Fanny is upset that Lenina is having such a long relationship with only one man who is Henry Foster. She quotes the phrase "everyone belongs to everyone" and tells Lenina to have sex with other men. I hope I have helped you with this. Looking forward to help you again.
Answer:
They are techniques used to build logical support for an argument. They make nonfiction writing more entertaining. They are rhetorical devices used for persuasive effect