Please write a research report on a topic of [বিষয়]. Ensure that your report includes the following features: 1. A clear problem statement and research objective; 2. A comprehensive analysis and review of existing literature and data; 3. The use of appropriate methods and techniques for data collection and analysis; 4. Respond in Bengali. Accurate conclusions and recommendations to answer the research question and address the research objective. Please keep the report concise and well-structured, using relevant examples to illustrate your points.