What term describes the uniqueness of a text that reflects the author's individual expression?

The term that best describes the uniqueness of a text in relation to the author's individual expression is "voice." In literature, voice refers to the distinctive way an author conveys their thoughts, emotions, and personality through their writing. It encompasses elements such as word choice, sentence structure, and rhythm, all of which contribute to the overall feel and character of the text.

Voice is what makes a piece of writing recognizable as belonging to a specific author, enabling readers to connect with the writer's individual perspective and emotion. This is why it is a crucial component in understanding a text's meaning and intention, as it reflects the author's personal touch and perspective on the subject matter.

While style and tone are related concepts, they do not capture the full essence of the author's individual expression as voice does. Style refers more broadly to the overall aesthetic and formality of writing, while tone describes the emotional quality or attitude toward the subject. Perspective, on the other hand, relates more to the point of view from which the story is told rather than the personal expression of the author within the text. All these elements contribute to a narrative but do not encompass the same sense of individuality that voice does.