Essay is a piece of writing directed to discussing certain issues from a specific angle. Based on the point of discussion, essays can be argumentative, descriptive, informative/expository, persuasive, analytical, comparison and contrast, application, and others. Typically, this type of paper requires the following structure: introduction with a thesis statement, body paragraphs, having both topic and concluding sentences each, and overall conclusion. The tone and style of writing may vary depending on the instructions.