One explanation for the economic difficulties experienced in much of africa today is that many africa countries have economic systems

a restricted trade
b free trade
c import- oriented
d export- oriented

The difficulties experienced in much of Africa today is that many African countries have restricted trade economic systems.

Option A

Explanation:

Africa is a country which has restricted trade and hence has no significant increase in their economic systems. The little African countries trade only with each other which did not give any perspective increase. Africa needs to have free trade which would lead to a rather faster economic growth.

Free trade would pave a way for Africa to trade with many other countries and lead way towards better enhancement. Free trade will provide an international market of producers and manufacturers to have trade with Africa.Only free trade can lift up the economy of the African countries.

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.