What parallel line divided north vietnam and south vietnam?

The Vietnamese Demilitarized Zone was a demilitarized zone established as a dividing line between North and South Vietnam as a result of the First Indochina War. During the Vietnam War, it became important as the battleground demarcation separating North from South Vietnamese territories.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.