Sub-saharan africa
a) contains more than a billion people.
b) has a young population in comparison with western countries.
c) has a relatively high gni per capita.
d) has seen declining population numbers in recent years due to aids.

The correct answer is B: Sub-Saharan Africa has a young population in comparison with western countries

Explanation:

Africa has the largest concentration of young people in the world (15-24 years). The continent’s youthful population presents a powerful opportunity for accelerated economic growth and innovation. Nonetheless, if governments do not provide young people with good employment opportunities, instability and civil conflict may arise. Variations in population may include levels of education, poverty, urbanization, access to health care (including family planning methods) and attitudes towards population growth. Apparently, some attitudes towards population growth have been the reduction of mortality and fertility rate in Sub-Saharan Africa. Childhood deaths have also decreased.

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.

citizens were able to charge more for their goods and services