By the ninth century, the Khmer empire had emerged in eastern Indochina. It developed around agriculture and used

reservoirs to store water. To the south, the Srivijaya empire emerged in Indonesia. It relied on farming and trade. Is this true?

Yes, this is true. The Khmer empire, centered in what is now Cambodia, was known for its advanced agricultural practices and system of reservoirs for irrigation. The Srivijaya empire, located in present-day Indonesia, also relied on agriculture as well as trade to sustain its economy. Both empires were significant powers in Southeast Asia during the ninth century.