Final answer:
Intensive agriculture in China first emerged in the Yellow River Valley, where millet was cultivated, and the Yangzi River Valley, known for early rice agriculture. Regions such as the high plateau of Tibet and the steppe lands of Mongolia were not suitable for early intensive agricultural practices.
Step-by-step explanation:
Intensive agriculture first emerged in specific areas of China, leveraging the natural resources and conditions that were conducive for early agricultural development. In the context of China, intensive agriculture began in:
- The Yellow River Valley: This region, which had productive agricultural lands and was an area of Neolithic settlements primarily cultivating millet.
- The Yangzi (Yangtze) River Valley: This site of early rice agriculture by Neolithic settlements and later extensive rice and wheat farming.
However, not all areas mentioned were suitable for early intensive agriculture. The high plateau of Tibet and the steppe lands of Mongolia were not favorable due to their climate and geographical constraints, and hence did not see the emergence of intensive agriculture during the same period.