An argumentative essay presents a claim and supports it with evidence from sources. It should take a clear stance on an issue that can be supported, such as whether selling marijuana in public places should be illegal. The essay includes an explanation of the issue, a thesis statement stating the stance, a summary of opposing arguments, rebuttals to those arguments, and arguments supporting the stance. Key elements are explaining the issue, a clear thesis, summarizing opposing views, rebutting them, and making your own argument.