Slide to correct answer him from each drop down menu. gold trade and blank kingdoms played an important role in the birth of the slave trade in africa. was slavery was common in africa, if you gain a lucrative commercial business one blank start buying slaves. african ! and curtiss slide to correct answer from each drop down menu. gold trade and blank kingdoms played an important role in the birth of the slave trade in africa. was slavery was common in africa, if you gain a lucrative commercial business when blank start buying slaves. african rulers and curtiss trade as it made them wealthier.