This document discusses the key parts and structure of an essay. It explains that an essay is a written piece consisting of multiple paragraphs focused on developing a central idea about a single topic. The main parts of an essay are the introduction, body, and conclusion. The introduction introduces the topic, provides background, and includes a thesis statement expressing the central idea. The body paragraphs each discuss a subtopic that supports the thesis. The conclusion restates the main points without introducing new information.