In literature, what is the combination of form and content that shapes an author's unique voice?

The choice of "style" effectively encapsulates the combination of form and content that shapes an author's unique voice in literature. Style refers to the distinct way in which an author expresses their thoughts through language, including elements such as word choice, sentence structure, figurative language, rhythm, and tone. It is what makes an author's writing recognizable and contributes to the overall effect of the literary work.

While structure pertains to the organization of a text, such as how a narrative is arranged or how arguments are presented, it doesn't encompass the full breadth of an author's voice, as it focuses more narrowly on the framework of the work. Device typically refers to specific techniques or tools used within the writing, like metaphors or imagery, rather than the overarching voice itself. Genre, on the other hand, categorizes texts into types based on shared features or themes, but it doesn’t convey the unique stylistic fingerprints that individual authors bring to their work.

Thus, "style" is the more comprehensive term that indeed captures how form and content meld to create a distinctive authorial voice.