Key elements of effective answer writing for UPSC include clarity, brevity, and coherence. Starting with a concise introduction sets the stage, followed by well-structured body paragraphs that include relevant examples and analysis. It’s crucial to address the question directly, focusing on the key points, and using subheadings for clarity when necessary. Candidates should also conclude with a summary or opinion. Practicing time management and honing writing skills through mock tests enhances overall performance in the examination.