I NEED SOME HELP Economic and trade union of Asian nations

A. NAFTA

B. ASEAN

C. UN

D. AU

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

Adesert is an example of a(n) and the gobi desert is an example of a(n) a. ecosystem biome b. biome ecosystem c. ecosystem climate d. climate biome

How does central place theory explain patterns in the size and distribution of cities?