Skills that enhance the ability to present arguments during the UPSC examination include critical thinking, logical reasoning, and effective structuring of ideas. Candidates should practice organizing their essays in a clear format, effectively supporting claims with relevant examples and data. Mastery of language and persuasive techniques is crucial for communicating complex ideas compellingly. Engaging in debates or discussion forums can further refine these skills, preparing aspirants to articulate their arguments clearly and confidently, crucial for success in UPSC examinations.