What literary term describes the author's intentional affect on the reader through their choice of words?

The correct term that describes the author's intentional effect on the reader through their choice of words is diction. Diction refers to the specific words and phrases an author chooses to convey their message, tone, and style. By selecting particular words, the author can evoke emotions, create vivid imagery, or establish a certain voice, all of which can significantly influence how the reader perceives the text.

For example, using formal, complex language might evoke a sense of sophistication, while choosing colloquial or simple language could create a more casual or relatable tone. Ultimately, diction shapes the reader's experience and emotional response to the text, making it a crucial element in literary analysis.