In your a good man charlie brown why does charlie brown hesitate when answering lucy’s survey

there was a box in a bag in front of a house with a paper with it.a girl used it for an example, she then got a letter and went on a trip to go to a party in   a cabin and she only said one word""

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."