Arthur<span> “</span>Boo<span>” </span>Radley<span> lives in the run-down </span>Radley<span> Place. As a boy he got in trouble with the law so his father locked him in the house for 15 years. He then stabbed his father with scissors. When his father died, his brother Nathan moved in and carried on shutting </span>Boo<span> inside.</span>
The answer to your question would be sarcasm XD
It affects the narrator's tone in a piece of writing.