Final answer:
North and South Korea are divided along the 38th Parallel, a latitude line that separates the two countries. It was the dividing line between the Soviet and US sectors during Korea's postwar reconstruction.
Step-by-step explanation:
North and South Korea are divided along the 38th Parallel. The 38th Parallel is a latitude line that passes through the center of the Korean Peninsula. It was used as the dividing line between the Soviet and US sectors during Korea's postwar reconstruction, and it soon became the border between Communist North Korea and non-Communist South Korea.