Censorship is when books, movies, TV shows, etc. Are removed or changed to block out content that is deemed inappropriate. For example, “To Kill a Mockingbird” by Harper Lee was banned mainly because of the use of racial term and racist content within the book. The differences between a banned and challenged book is that banned books are not allowed to be read, whereas challenged books may still be read however it undergoes some changes such as different diction or deleted or revised content. Fahrenheit 451 may be a challenged book due to it possibly advertising suicide or self harm as Mildred overdosed on sleeping pills. Another reason could be that the children in the book murder others for fun, which should not be advertised. 
https://variety.com/2018/legit/news/to-kill-a-mockingbird-lawsuit-broadway-1202726993/
Patrick,
Good response! I enjoyed your commentary on the difference between banned and challenged books. Further exploration into 451 would have enhanced this post, as you make a good assumption about suicide as one of the issues that arises from this novel.
Thanks for sharing this on your Edublog and not only have I given you credit for the homework, but I am pleased you were able to take so much from yesterday’s lesson.
Thank you,
Mr. Barazzuol
bbarazzuol@sd43.bc.ca