Answer:
1)The small early states that were established were greatly influenced by Indian culture, as was most of Southeast Asia. Indian influence in the region dates back to at least the 3rd century BCE. South Indian culture was spread to Southeast Asia by the south Indian Pallava dynasty in the 4th and 5th century. Influence of China and India. Between approximately 150 bce and 150 ce, most of Southeast Asia was first influenced by the more mature cultures of its neighbours to the north and west. Thus began a process that lasted for the better part of a millennium and fundamentally changed Southeast Asia.
2)Among the religions in Southeast Asia, the largest are Islam, Buddhism, and Hinduism. Christianity is also followed.
3)Angkor Wat is an enormous Buddhist temple complex located in northern Cambodia. It was originally built in the first half of the 12th century as a Hindu temple. Spread across more than 400 acres, Angkor Wat is said to be the largest religious monument in the world.
4)Between the tenth and fourteenth centuries, the kingdom that we call Angkor dominated much of mainland Southeast Asia. Its capital at Yasopdharapura, north of Cambodia's Great Lake, held over a million people, making it one of the most populous cities in the world.The Angkor Civilization (or Khmer Empire) is the name given to an important civilization of southeast Asia, including all of Cambodia, southeastern Thailand, and northern Vietnam, with its classic period dated roughly between 800 to 1300 A.D