If a variable stands by itself what is its coefficient?

Which place is most likely depicted in aaron douglass's painting, song of the towers?

23. how does specialization among nations encourage interdependence? nations work together to share labor and resources to produce vital goods. nations sign treaties prohibiting taxes on imports. nations produce specific goods and then trade to obtain things they need. nations that are more developed agree to fund development in nations with limited industry.

Made up of nato and cento a: communist countries b: democratic countries