Censorship is having control over what is being put out into the public. Censorship varies from country to country, common censored items include profanity, sexuality, nudity and violent scenes. These things are censored because they may not be acceptable for a specific audience to have access to, they can be seem as harmful, offensive and provoke many issues. The difference between a banned book and a challenged book is that when a book is challenged, it is having attempts to remove or restrict the book from being allowed into the public and a banned book is not allowed and has been removed from the public. A book that is banned and has been challenged is To Kill a Mockingbird. This takes place in the 1930s and is about a man taking on a case for a black man being accused of raping a white woman. The reason this book has been banned throughout many school curriculums is because it includes many racial slurs, profanity, promotes white supremacy and many other issues. The novel, Fahrenheit 451 might be banned or challenged could be violence/suicide happening for the way a woman was burned to death.
https://www.easons.com/fahrenheit-451-ray-bradbury-9780006546061