Which of these is the pattern an author uses to present his or her ideas?

The pattern an author uses to present his or her ideas is called structure.

Here's why:

* Structure refers to the overall organization and arrangement of information in a piece of writing. This includes the sequence of ideas, the use of headings, subheadings, paragraphs, and other organizational elements.

Let's break down why the other options aren't quite the same:

* Style: Style refers to the author's distinctive way of writing, including their word choice, sentence structure, tone, and use of literary devices.

* Theme: Theme is the central idea or message conveyed in a piece of writing. It's not the pattern itself, but rather the underlying concept.

* Tone: Tone is the author's attitude toward the subject matter, which can be expressed through their word choice and sentence structure. It's not directly related to the organizational pattern.

So, while all these elements are important in writing, structure is the term that specifically refers to the pattern an author uses to present their ideas.