Answer:
Trans-Sahara trade is one of the oldest trading networks in Africa.
Explanation:
The trading network requires to travel across the Sahara between sub-Saharan Africa and North Africa. Existing since prehistoric times, it reached its peak in the 8th century. In West Africa, the changes came in Ghana when the Almoravids sacked the city and the Ghāna Empire decline.
Mali rise in the 13th century as gold became the core of the trans-Saharan trade. The Trans-Sahara trade saw the rise of empires like Mali, Songhay, and Bono-Mansu. Expansion of urban centres and towns happened as Kano became one of the urban centres in West Africa. Trade also saw the rise of trading classes call the Wangara.
The given statement is true as the evolutionary theorists accepted that the growth of the societies was based on the similar or different stages of social development.
<h3>What is social development?</h3>
Social development refers to the betterment of the standard of living of the people residing in the society.
In the year the 1800s, there was no theory that fully describes the aspects relating to changes in societies. As a result, the theorists trusted that societal growth entirely depends on similar or distinct stages of social development.
Therefore, the theories of the 1800s explained the distinct or same stages of social development which would be the result of the growth of societies.
Learn more about the social development in the related link:
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Complex behaviors that are innate, fixed, and universal are called instincts.
Instinct is a fixed response to a certain stimulus, or inclination towards a certain behavior which is universal, meaning that it happens in every organism. Instincts are innate, meaning that you are born with them and cannot learn them.
