The character who opposes the protagonist, often "the bad guy" in a story. Example: Darth Vader, Voldemort

When the suspense occurs, or conflict begins in a story

The conflict has been taking care of, and all loose ends are tied up.

The very end of a story

The leading character, often the "the good guy" in a story. Example: Harry Potter, Luke Skywalker.

The beginning of a story, characters are introduced, the main conflict begins

Central idea of a work of literature

Most exciting moment of the story; turning point

The basic story line of a book, or text.