Final answer:
European empires targeted the coastal regions, areas with valuable resources, and areas with weak or decentralized governments in Africa as these regions were more vulnerable to European control.
Step-by-step explanation:
European empires targeted the coastal regions, areas with valuable resources, and areas with weak or decentralized governments in Africa. The coastal regions were easier to access and control by European powers due to their proximity to advanced warships. Areas with valuable resources were seen as more valuable to European empires, as they could be exploited for economic gain. Additionally, areas with weak or decentralized governments were easier to conquer by European powers. These factors made the coastal regions, resource-rich areas, and territories with weak governments more vulnerable to European imperialism.