Desertification and deforestation are a. environmental challenges facing the sahel c. economic issues facing the sahel b. issues the sahel nations have solved in recent years d. the reasons the sahel cannot get foreign aid

the correct answer that would best complete the given statement above would be option b. expanding civil services. diocletian and constantine paved the way for foreign invasion by dividing the empire, creating administrative bureaucracies and reorganizing the military, except for expanding civil services. hope this answer .

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explanation:

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.