What is a hook in narrative writing?

A narrative hook (or hook) is a literary technique in the opening of a story that "hooks" the reader's attention so that he or she will keep on reading. The "opening" may consist of several paragraphs for a short story, or several pages for a novel, but ideally it is the opening sentence. Narrative Hook.

A narrative hook is a literary technique in the opening of a story that "hooks" the reader's attention so that they will keep on reading. The "opening" may consist of several paragraphs for a short story, or several pages for a novel, but ideally it is the opening sentence in the book.

What are the statements?