Final answer:
The location referred to by the clues in the question, which include Angkor Wat and its transformation from a Hindu to a Buddhist temple, as well as the prominence of rice fields, is Cambodia.
Step-by-step explanation:
The East, South East, or South Asian location represented by the clues given is Cambodia. The clues reference Angkor Wat, a temple originally dedicated to the Hindu god Vishnu and later transformed into a Buddhist temple complex. The impressive architecture and transformation of religious function indicate the impact of Hindu and Buddhist influence on the region. The existence of large rice fields aligns with the known agriculture of the area, supporting the identification of Cambodia as the location in question.
The Khmer Empire, notably with Hinduism as its state religion, constructed the temple complex of Angkor Wat. With the transition in the thirteenth century, Angkor Wat became an important Buddhist center. The influence of India is evident in the religious practices and temple construction techniques, although the culture contains unique Cambodian elements.