Final answer:
A thesis is generally one sentence long and is found toward the end of the introduction. It effectively states the writer's argument and position on a debatable issue and guides the direction of the essay, ensuring all points made relate back to this central argument.
Step-by-step explanation:
A thesis is typically one sentence long and appears toward the end of the introduction. It articulates the main argument of the essay and it should be short, specific, debatable, and clear. The purpose of the thesis is to introduce the issue and assert your position on a debatable topic. As such, the thesis is a crucial part of an essay since it establishes your stance, which is then supported throughout your writing with credible researched evidence. Good academic writing clearly presents the thesis statement in the introduction, giving readers insight into the essay's purpose and direction.
A thesis statement must be written as a declarative sentence, and while it may summarize your argument, it should not be a simple restatement of facts. Ideally, a thesis statement will preview the organization of your paper and the points you will explore, keeping your writing focused and on track. The thesis is the foundation of your essay, guiding your arguments and ensuring they relate back to this central claim.