When incorporating direct quotations into writing, what is the function of quotation marks?

Which words most the reader understand the meaning of usurpers

Which of the following sentences uses dashes correctly? a. i looked under the bed - get this - and there it was! b. i need - a lot of - colors for this painting. c. i can't believe my own - brother! - is now a mayor. d. tom and i - are planning - a wedding in june.

Which word in this excerpt from act i, scene i, of richard iii means “to listen”