4. The ordered arrangement of incidents in a story.
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Plot

Explanation:

Plot, the action element in fiction, is the arrangement of events that make up a story.

The sequence of events told in a story, plot is also known as narrative structure. There are usually considered to be five elements in a plot line: exposition or background information, rising action (that which complicates the story), climax or crisis, falling action, and resolution.

- "the basic difference between keywords and subjects is that subjects (or "subject headings") have been predetermined, while keywords have not. a keyword is an easy place to start because you can use any word that seems to fit your search; this is called "natural language" searching."

its a hard situation i cant really answer because the essay is for you to write.