For the UPSC essay paper, thesis development can be approached by clearly defining a central argument or position. This involves selecting a pertinent topic and crafting a concise, compelling thesis statement that encapsulates the main idea. To support the thesis, gather relevant evidence and examples that reinforce the argument. Organizing the essay logically, with distinct sections for introduction, body, and conclusion, enables clarity. Additionally, ensuring the thesis is adequately reflected in each paragraph will maintain coherence and drive the essay toward a strong conclusion.