Final answer:
Province number 5 in Nepal is characterized by its ethnic diversity and cultural festivals, which showcase the rich cultural practices and traditions of its various ethnic groups.
Step-by-step explanation:
The socio-cultural features of province number 5 in Nepal are best represented by option a) Ethnic diversity and cultural festivals. This region of Nepal is known for its mosaic of different ethnic groups and their distinctive cultures, traditions, languages, and festivals. Celebrations such as Dashain, Tihar, and Teej, among others, underscore the rich tapestry of cultural practices that bring the diverse communities together. Ethnic diversity is a hallmark of the region, where numerous ethnic groups like the Tharu, Magar, and Brahmin coexist, each contributing its own unique cultural expressions and customs to the province's identity.
Cultural identity is further accentuated through various cultural festivals that are deeply rooted in the socio-religious fabric of the region. These festivals, which often follow the lunar calendar, are reflective of the indigenous beliefs, agricultural cycles, and historical events significant to the local people. Such cultural prowess helps to retain the unique identity of the region despite the challenges posed by globalization and modernization.