Which factors in west and east africa allowed their cultures to endure?

The cultures of West and East Africa could manage to endure due to international trade which brought access to European textiles and metal goods. New food crops were also introduced to these lands and agriculture maintained on a stable and hight level. All these factors enabled the endurance of these cultures.

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.