Which term refers to the side or opinion the author is taking in their writing?

The term that refers to the side or opinion the author is taking in their writing is "Position." This is because an author's position reflects their viewpoint or stance on a particular issue or topic, guiding how they present information and arguments in their writing. Understanding the author's position is crucial for comprehending the overall message and intent of the work, as it can deeply influence the narrative, tone, and persuasive strategies employed.

In contrast, the theme refers to the overarching message or underlying concept conveyed across a piece of writing. The main idea signifies the primary point or focus of a specific text, encapsulating the primary thought the author wants to communicate. Purpose relates to the author's intention behind writing, whether it is to inform, persuade, entertain, or explain. While these terms are interconnected, they each address different aspects of a text, making "Position" the most accurate response to describe the author's side or opinion in their writing.