These factors contribute to desertification. 1)cactus growth 2)farming 3) landfills 4)overgrazing 5)urbanization 6)water table depletion

An area of land that is drained by a single river is called a/an:
a) drainage basin 
b) watershed 
c) both watershed and drainage basin 
d) aquifer 
e) wetland

both watershed and drainage basin

South carolina was so angry about the election of lincoln that they seceded from the union on december 20, 1860. they attacked fort sumter later, on april 12, 1861.