Final answer:
Threats to Nepal's unity include ethnic tensions, political instability, economic disparities, and external influences, which collectively pose challenges to the nation's stability and development.
Step-by-step explanation:
The threats to the unity of diversified Nepal include ethnic tensions, political instability, economic disparities, and external influences. These factors collectively undermine the nation's stability and development. Ethnic tensions give rise to conflicts between different cultural groups, often leading to social unrest. Political instability has been a significant issue in Nepal, resulting in frequent protests and civil unrest which discourage tourism and depress the economy. Economic disparities are evident as the agricultural and tourism-based economy struggles with poverty and underdevelopment, leading to inequality and a lack of resources. Finally, external influences, including global issues like climate change and political unrest, challenge Nepal's ability to manage its internal affairs and contribute to national divisions.