I believe the answer is: Usman and Fodio
Both these scholars wrote hundreds of books for African people regarding, government, culture, religion, and social science.
These knowledge has been used for the past Three centuries after their arrival, by people in western africa as a foundation to built their islamic states.
The correct answer is belief perseverance.
Perseverance is a quality of those who persist, who are consistent in their actions and do not give up in the face of difficulties.
To persevere is to achieve your goals due to the fact of staying firm and faithful to your ideas and purposes.
Answer:
external
Explanation:
The process of applying the conclusion of a particular scientific study into a study which is outside its context is said to be external validity. The conclusions derived in one particular study is applied to other situations through external validity. There are cases when such generalization brings a negative result to the study. Also, the factor of generalization is limited to some extent.