Factors contributing to desertification in the Sahel include all of the following except
A) deforestation and overgrazing.
B) population increases.
C) southward expansion of desert conditions following persistent drought.
D) lack of a regional environmental policy.
E) northward shift of the ITCZ.
E
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Population change =
A.
(Births + Deaths) 
(Immigration + Emigration)
B.
(Births 
Emigration) + (Deaths 
Immigration)
C.
(Births 
Immigration) + (Deaths 
Emigration)
D.
(Births + Emigration) 
(Deaths + Immigration)
E.
(Births + Immigration) 
(Deaths + Emigration)
The direct collision of a raindrop with the ground, laterally shifting fine particles a few millimeters, is ______.
a - splash erosion b - valley cutting c - rill formation d - peds pushing e - plucking
The immediate causes of slope failures, such as earthquakes or heavy rainfall, are called ________.
A. sparks B. creators C. trips D. triggers E. roots
Barrier islands are more common along the Atlantic Coast than the Pacific Coast
Indicate whether this statement is true or false.