What is a generalization?

What sentence correctly uses it’s underlined relative pronoun?

Using apostrophes, hyphens, dashes, brackets, and parentheses correctly correct each error in the use of apostrophes, hyphens, dashes, brackets, and parentheses in the following sentences. you may need to add, delete, or change marks of punctuation. doesnt this turkey look oh, no, the cat must have gotten up on the counter!

Mr and mrs van daan murmur their welcome what are the playwrights indicating by using the word murmur?