What is the name of the are seperating the two koreas?

Pretty sure its called the 38th Parallel, or the Demilitarized Zone. :)

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

Answerbecause of improved transportation, communication, and other advantages;