smart people always think of clever answers.
You have not given the options to choose from, but if Wikipedia is one of the answer choices, then it is most likely that.
“As Atticus tells Jem and Scout, a mockingbird does no harm and makes music for people to enjoy. Tom Robinson is like a symbolic mockingbird because of his innocence; he has not harmed anyone and is an admirable character who offers help to others. Because Tom is not guilty, it makes it "sinful" to harm him.”
