Where were most people concentrated in ancient china amd why

The ethnic Han in China, about 1.3 billion people, live all over the country, but most are concentrated in their ancestral homelands in the provinces that are along the middle and lower parts of the Yellow River Basin, along the Yangtze River basin, and along the Pearl River.

the answer is a. since they were a huge producer of cotton and wanted the most money for it.

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.