In what ways did the art and architecture of Southeast Asian cultures, such as those seen at Angkor Wat and Borobudur, integrate both Hindu and Buddhist elements, and what does this integration reveal about the region's history?

In what ways did the art and architecture of Southeast Asian cultures, such as those seen at Angkor Wat and Borobudur, integrate both Hindu and Buddhist elements, and what does this integration reveal about the region's history?