"Megan Parker keeps running to check her mailbox, she is waiting for a letter from my cousin."
Correct version
"Megan Parker keeps running to check her mailbox. She is waiting for a letter from her cousin."
The conclusion of a narrative is to kind of summarise a narrative and some times to show a counter claim
Side stories of other people add to the story , because it shows how they feel about the topic and sooner in the story you'll see how boo radley and tom Robinson are similar to each other