Answer :
Based on the fact that this change is related to Africa, the change that the diagram depicted is b. The rise of the slave trade in the Caribbean supplied forced labor to conquering Europeans in the wake of the near annihilation of Native populations as a result of disease.
How did the slave trade become prosperous?
When the Europeans first conquered the Americas, they used Native Americans as their enslaved workers after they defeated and captured them.
However, the Native Americans died in large numbers due to European diseases but Africans who were enslaved proved to be more resilient to these diseases.
As a result, the slave trade in the Caribbean became more successful as it fed Europeans with the slavery demands that they required to engage in economic activities.
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