Final answer:
In a useful document, the introduction previews what will follow, announces the writer's viewpoint, and attracts the reader's attention but does not offer a solution.
Step-by-step explanation:
An introduction in a useful document serves multiple purposes, but it does not typically offer a solution. The introduction should preview what will follow, announce the writer's viewpoint, and attract the reader's attention. It will often include a thesis statement that previews the main idea and briefly touches on key points, serving as a roadmap by introducing the topic and the arguments that will be covered in the body paragraphs.
Engaging the reader can involve using an overview, anecdote, question, description, or quotation. The introduction establishes the writer's credibility and sets the context for understanding the subject matter, but it generally does not propose solutions; that is typically reserved for later sections such as the body or conclusion of the document.