When reading an informational text, how do you identify the author's thesis statement? The thesis statement is the first sentence of the introduction, in which the author introduces the topic for the first time. The thesis statement is found at the end of the conclusion and summarizes the supporting details in the text. The thesis statement is the sentence found at the beginning of each body paragraph and is followed by supporting details. The thesis statement is the sentence in the introduction that states the author's specific ideas about the topic.