What is a hook and why should I use it in my writing?
A hook is a sentence, paragraph, or even a word that draws your audience in and makes them want to read what you've written. This is often a question or an interesting sentence that relates to what you've written. If you're trying to write fiction or essays outside of school, this is vital since you need to grab your audience's attention away from Buzzfeed articles (which have their own hooks if you look carefully). Even if you're turning in an essay and the teacher has to read it, it's still good to put a hook in there. Not only will your teacher pay more attention to what you've written, but he or she might give you points for good structure.
Why didn't Hamlet just kill Claudius immediately? Why take up most of the play trying to decide what to do?
Hamlet is a strange play in that it's a revenge tale with a reluctant revenger. There were a lot of revenge tragedy plays in Elizabethan England and most of them went like this: Bad guys hurt an innocent person; that innocent person's family member decides to kill the bad guys and becomes a revenger; the revenger becomes even more evil than the original bad guys and dies. Hamlet seems to know that this is the pattern and doesn't want to become more evil than Claudius. He wants revenge, but he doesn't want to become evil while doing it. This is why he doesn't stab Claudius while he's praying and has to make sure that Claudius actually killed his dad. He knows he's going to have to give up any morality he has if he starts plotting revenge and wants to delay that for as long as possible. When Claudius sends him away to England to be killed though, Hamlet just snaps and goes for it. Is he selfish for only leaping into action when his own life is threatened? Probably. He is kind of a jerk.
Is "The Lord of the Rings" an allegory for World War II?
Technically, no. Tolkien started writing the book before WWII and has stated that some of the experiences come from his time as a soldier in WWI. Add to that the fact that he HATED allegories and it's a pretty fair bet that Tolkien didn't intend for Sauron to reflect Hitler. That being said, there are some parallels and the book could be read as an allegory for WWII. Tolkien wouldn't like it, but he's dead.