What was the purpose of pan-Africanism?

to bring together Africans from all parts of the continent
to spread African culture to people of other backgrounds
to empower Africa to develop colonies in other nations
to unite people of African descent around the world

Which reason best explains why certain areas of southwest asia have low population density? a. the semi-arid climate makes farming difficult because it produces very little rainfall.b. the moist climate limits job opportunities because it reduces oil production.c. the semi-arid climate produces heavy rainfall that contributes to devastating floods. d. the moist climate reduces agricultural production by causing water shortages.