My thesis statement on To Kill A Mockingbird is as follows: "Encounters with injustice shape beliefs of morality by exposing its true wickedness." What are three topic sentences I could use for this thesis?

A thesis statement is a sentence that explains to the reader the purpose of a paper. It should also explain the significance of the topic and act as a guide or a plan for the rest of the paper. In a thesis statement the author usually states a claim that he or she will be defending throughout the rest of the paper. A thesis statement typically is made up of three parts: the limited subject, the opinion, and the blueprint. The limited subject describes the topic, the opinion offers an answer to the question or claim, and the blueprint lays out the reasons and explanations to come.
The thesis statement, "Encounters with injustice shape beliefs of morality by exposing its true wickedness," is a solid start to a thesis statement. In order to improve this thesis, the word "its" should be changed. It is also important to include the title and author of the source in the thesis statement. This thesis also needs to offer more of a blueprint of reasons.
After these changes are made to the thesis, the topic sentence will be easier to write. A topic sentence is a sentence that expresses the main idea of a paper or an essay.
One example of a topic sentence is as follows: "The theme of injustice and its impacts on beliefs of morality are seen through the trial of Tom Robinson, an innocent man, and how this trial deeply affects the Finch family—especially Scout."
Another example of a topic sentence is as follows: "Harper Lee's novel exposes the wickedness of injustice and how injustice influences beliefs of morality through her descriptions of the citizens of Maycomb, Alabama and their false judgements and unfair treatment of other citizens in the community."
A third example of a topic sentence combines and adds onto the previous two: "Harper Lee develops the theme of the wickedness of injustice and its impacts on beliefs in morality by including citizens who falsely judge one another, the poor treatment of Boo Radley, and the trial of Tom Robinson, an innocent man who stands no chance in court."
A topic sentence should list out the reasons that will be further explained throughout the rest of the paragraph and the paper as a whole.