Introduction:
Practicing writing essays and explanations based on case studies in Paper II can be extremely beneficial for several reasons. In this response, we will discuss the advantages of such practice and provide detailed explanations.

Benefits of practicing writing essays and explanations based on case studies in Paper II:

1. Enhanced understanding:
- Writing essays and explanations based on case studies requires a deep understanding of the subject matter.
- Through this practice, you are compelled to thoroughly analyze the case study and its implications, leading to a better understanding of the topic at hand.

2. Application of knowledge:
- Paper II of the UPSC exam often requires the application of theoretical knowledge to real-life scenarios.
- By practicing writing essays and explanations based on case studies, you are able to apply your knowledge and demonstrate a practical understanding of the subject.

3. Critical thinking and problem-solving skills:
- Case studies present complex problems or situations that require critical thinking and problem-solving skills to address.
- Practicing writing essays and explanations based on case studies helps develop these skills as you analyze the case, identify key issues, and propose solutions.

4. Writing proficiency:
- Paper II places a significant emphasis on effective communication and writing skills.
- Regular practice in writing essays and explanations based on case studies allows you to refine your writing style, structure, and coherence, thereby improving your overall writing proficiency.

5. Time management:
- Practicing writing essays and explanations based on case studies helps you become more efficient in managing your time during the examination.
- It enables you to develop a systematic approach to analyzing the case, organizing your thoughts, and presenting them concisely within the given time frame.

Conclusion:
In conclusion, practicing writing essays and explanations based on case studies in Paper II offers numerous advantages. It enhances your understanding, allows for the application of knowledge, develops critical thinking and problem-solving skills, improves writing proficiency, and enhances time management abilities. By engaging in this practice, you can significantly improve your performance in the UPSC examination.