She looked towardthe sunset. This is the correct answer because you can say "she looked towardthe sunset" since it makes a lot of sense and you can't say "she looked betweenthe sunset" because it's just a weird answer... Towardis the best preposition to use here in this sentence.
Yes, it's true. Schools do allow topics based on religious things, but it depends on the topics though. If the topics are weird, I advise you to not write letters based on weird topics, ok?