Final answer:
Angkor Wat signifies cultural diffusion in Southeast Asia, indicating how the Khmer Empire embraced and adapted Indian religious and cultural elements while showcasing significant urban planning and architectural sophistication.
Step-by-step explanation:
Angkor Wat in Southeast Asia, built in circa 1100 CE, reflects cultural diffusion about world historical processes. This monumental temple complex, dedicated initially to the Hindu god Vishnu, signifies the intense cultural exchanges between Southeast Asia and India. Constructed by the Khmer Empire, Angkor Wat symbolizes the adaptation of Indian religious and cultural traditions by indigenous Southeast Asian societies, while simultaneously making these elements part of their own unique cultural heritage.
Later, under King Jayavarman VII, Angkor Wat underwent a transition from Hindu to Buddhist use; this adaptation further demonstrates the dynamic nature of cultural exchange within the region. Moreover, the grandeur and sophistication of the complex, with its significant urban planning, including roads, reservoirs, hospitals, and extensive networks of temples, exemplify technological advancements and centralization characteristic of the Khmer Empire's prosperity and organizational capabilities at the time.