Call it "complication" since you're responding to a reader's complicating questions. A generic structure that you may find useful is: brief recap of what you have covered in relation to the essay title; reference to the larger issue; evaluation of the main arguments; highlighting the most important aspects.
This is mainly because they are very effective in developing knowledge and writing skills for subject areas. It may be possible to use only one paragraph for your introduction, but it may fall more easily into two or more. Through a thesis statement, you can organize the evidence that are relevant to your claims based on their relevance to the topic and how you view it as a writer.
Presentation A tutor can learn a worrying amount about the quality of your essay simply from how it looks on the page.
Establishing a relevant structure to support your argument All essays need structure. Don't let your next essay be one of those.