Yes it is okay as long as you give credit to that person
<span>The purpose of a character foil is to offer a contrast to another character, usually the protagonist. This, thereby, helps deepen the foiled character's personality, since he has something to battle against, to essentially fight for his values and/or methods. Basically, it heightens the characterization of the other character. </span>
The “hook” is the opening sentence that grabs the readers attention.
the answer is most likely the first sentence
