What forecasts the main point of each paragraph?

The topic sentence plays a crucial role in forecasting the main point of each paragraph. It typically appears at the beginning of the paragraph and provides the reader with a clear idea of what to expect in the following sentences. By establishing the focus of the paragraph, the topic sentence sets the stage for the supporting details and evidence that will elaborate on that main point. This not only enhances the coherence of the writing but also helps guide the reader through the author's argument or narrative.

In contrast, a thesis statement encapsulates the overall argument or main idea of an entire piece of writing, rather than individual paragraphs. Supporting details are the facts, examples, or explanations that reinforce the topic sentence but do not serve to forecast the main idea of the paragraph. The conclusion summarizes the overall arguments and provides closure to the document, rather than indicating what the paragraphs contain. Thus, the topic sentence is essential for guiding readers through the structured development of ideas within the text.