How do you distinguish one period from the next?

Jennifer is visiting her grandmother, who lives in the northeast corner of oklahoma. the region is home to many lakes, and jennifer enjoys canoeing on the illinois and grand rivers. to which region of oklahoma is she traveling? the prairie plains, the ozark plateau, the red river plains, the red beds plains

Pollution from one country can affect another. for example, south korea is especially affected by pollution and dust storms that come from

Why is there little farming in mongolia