First of all it should be what are the elements. Anyway, make sure you know your subject, and only write down facts, also make sure your punctuation is correct . Good luck .
An essay should include the introduction paragraph, body paragraphs, and conclusion. The introduction and conclusion are one paragraph each. The body can contain as many paragraphs depending on how lengthy you want the essay to be.
Working at custom essay writing service, I also believe that the essays should carry features like being Original, Explanatory, Analytical, Well-organized, Cohesive, Completeness, Specific and Concise.