What term describes the position or claim that the author establishes in a text?

The term that describes the position or claim that the author establishes in a text is often referred to as "Argument/Position." This is because the author typically articulates their stance on a particular issue or topic throughout the narrative or discussion, weaving evidence and reasoning to support that viewpoint.

While "Thesis" could also seem relevant, as it often encapsulates the main idea or argument within an academic or formal piece of writing, a thesis statement serves as a specific declaration that appears usually at the beginning of an essay. The broader concept of an argument or position encompasses the entirety of the author's stance rather than just a singular statement.

Additionally, "Claim" is closely related, as it refers to specific assertions made by the author to support their argument. However, it does not fully encapsulate the entirety of the position being argued, which includes all supporting assertions and reasoning. The term "Conclusion" refers specifically to the final thoughts or summary presented at the end of a text, rather than the central argument established throughout the piece.

Consequently, "Argument/Position" accurately captures the comprehensive essence of the author's stance within the text, making it the most appropriate choice in this context.