What is the best definition of a hook in a text trailer?

A hook is a technique that grabs the reader’s attention and makes them want to read a book.
A hook is a short video or slide presentation that provides an overview of a book’s story.
A hook is a way of showing emotion or attitude about a piece of writing through word and detail choices.
A hook is a restatement of the ideas in a text that focuses on the central points and is told in one’s own words.