Which natural resource, found in large amounts in India, China, North Korea, and South Korea, is important to each of those countries' economies?

Most important are iron ore and coal, although greater emphasis has been given to the extraction of gold, magnesite (magnesium carbonate), lead, and zinc. Other abundant minerals include tungsten, graphite, barite (barium sulfate), and molybdenum.

Explanation:

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity

that is probably something for you to answer