Idea, motive, structure, evidence, explanation, coherence, implication, and presence.
Idea - the general thought behind the essay - the thesis statement
Motive - the reason behind writing the essay - the point you are trying to convey
Structure - the shape that your main ideas take throughout the essay - the sequence in which you include your sub-topics
Evidence - the facts or details supporting your main ideas and points - quotes or other supporting details
Explanation - information to support your evidence and main points - background information
Coherence - the smooth flow of the statements in the argument
Implication - areas where you speculate the general significance of your argument
Presence - the sense of life throughout the writing