Critical thinking is essential for answering UPSC questions, as it enables candidates to analyze information analytically and synthesize ideas effectively. This skill allows for deeper understanding and evaluation of complex issues, going beyond rote memorization. When faced with essay or opinion-based questions, critical thinking fosters a multi-faceted approach, encouraging candidates to explore various perspectives, weigh evidence, and formulate balanced arguments. Thus, cultivating this ability enables aspirants to present nuanced and logically reasoned responses, critical for the UPSC examination.