The answer is, "Friar Laurence is assuring the Capulets that Juliet is happy in heaven."
If you look more into the full excerpt, you can see that Friar Laurence's whole monologue was meant to comfort the Capulet's regarding Juliet's death so that they would stop crying. He continues to reassure them that Juliet is in a better place in heaven and that they have no reason to continue crying.
Answer:
you got it right it perfectly fine
Martin Luther King Jr. was arrested and sent to jail because he and others were protesting the treatment of blacks in Birmingham, Alabama.
Sally is antecedent for herself
letter is an antecedent it
the antecedent is what the pronoun modify