As you're preparing for your assessment tomorrow it will be beneficial for you to revisit Kurt Vonnegut's definition of style:
"Newspaper reporters and technical writers are trained to reveal almost nothing about themselves in their writings. This makes them freaks in the world of writers, since almost all of the other ink-stained wretches in that world reveal a lot about themselves to readers. We call these revelations, accidental and intentional, elements of style."
An author's style consists of the decisions he or she makes in the construction of the text. It is these choices that reveal an author's distinctive personality in his or her writing.