A speech is a spoken presentation that is typically delivered to an audience. Speeches can be informative, persuasive, or entertaining, and they can cover a wide range of topics. The main elements of a speech include the introduction, the body, and the conclusion.
An essay is a written work that presents an argument or point of view on a particular topic. Essays are typically longer than speeches and can be more complex in their structure. The main elements of an essay include the introduction, the body paragraphs, and the conclusion.
Plot is a term used to describe the sequence of events in a story. It is not a main element of speech or an essay because speeches and essays are not typically structured around a plot.