Due to same religion of the people, it act as a unifying force.
Explanation:
Hinduism served as a unifying force in South Asia from 1200 to 1450 CE because it was the main religion which was practiced by most of the population of people living in these regions. So it bring unity among these people due to the same religion of most of the people of South Asia. So we can say that Hinduism served as a unifying force among people in the region of South Asia.
