Remember that other students talk to the teacher too, and they can pass on what they have heard. Be creative, but be sure to mark the big ideas. Exam answers can take many forms. Some students have done scripts for Oprah or for 90210. Others have done arguments between two theorists or a play.
Most folks do the standard essay.
Do what feels best to you. But be sure, however you frame your answer, to mark the main points of it so we can tell. Go back to the question and check it against your answer to make sure you have answered all of the points in the question. Check your paper to make sure they main points of the answer are clear to the reader. Don't assume the grader has seen your earlier papers .