Interlinking subjects is crucial for UPSC preparation as it promotes a comprehensive understanding of interconnected concepts. Many topics do not exist in isolation; for instance, environmental issues often overlap with socio-economic and political factors. Recognizing these links can help candidates draw parallels and apply knowledge more effectively in essays and discussions. Interlinked subjects also enhance critical thinking, encouraging aspirants to analyze issues from multiple angles. By understanding the relationships between subjects, candidates are better positioned to tackle intricate questions and develop well-rounded arguments during the examination.