What caused the balkanization of czechoslovakia and yugoslavia?
a)earthquakes
b)ethnic conflict
c)impassable mountain ranges
d)use of two different alphabets

The yellow river is also known as the huang he river? true or false

Gemstones are commonly found in pegmatites, which are igneous rocks that are a. exceptionally mafic b. exceptionally coarse grained c. exceptionally fine grained d. extrusive, forming from lava

The meseta in spain is a a. navigable river b. castle c. coastal plain d.plateau