High schoolenglish 5+3 pts 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 the sentence in the introduction that states the author’s specific ideas about the topic. the thesis statement is the sentence found at the beginning of a body paragraph, which is followed by supporting details. the thesis statement is the sentence found at the end of the conclusion, which wraps up the author's ideas on the subject.