North and south korea are divided by a demilitarized zone located at the parallel. 30th 38th 40th 45th

38th

Explanation:

The line which divides the territories of North and South Korea is located at the 38th parallel, and it consists of a demarcation line and a demilitarized zone (not exactly at the parallel). This parallel was established as a boundary in August 1945, separating Soviet and American occupation zones. In 1948, this boundary became the line between the Democratic People's Republic of Korea (North Korea) and the Republic of Korea (South Korea). The territory south of the parallel was invaded on June 25, 1950, which sparked the beginning of the Korean War.

social status of early civilizations was based primarily on economic power.- true ( first choice)

by creating a labor shortage that pushed the continent toward a market economy