A thesis statement is an assertion, not a statement of fact or an observation.
Fact or observation: People use many lawn chemicals. Thesis: People are poisoning the environment with chemicals merely to keep their lawns clean. A thesis takes a stand rather than announcing a subject.
Announcement: The thesis of this paper is the difficulty of solving our environmental problems.
As hinted earlier, some people confuse literature review with a book finder. As a result, literature think all that is required is to read a book and say what you go about its content, review, and structure.
Pradushan Marathi nibandh, Marathi essay on pollution, by Smile Please Kids