Final answer:
By the fifteenth century, most West Africans practiced polytheistic religions that invoked deities and spirits. These ancient African religions worshiped multiple gods and held ancestors in high regard. The beliefs and practices were common among different West African cultures.
Step-by-step explanation:
By the fifteenth century, most West Africans practicing ancient African religions believed in a pantheon of deities and spirits. These religions were polytheistic, meaning they worshiped multiple gods. The deities personified various natural forces and aspects of life, such as earth, harvest, and fertility. Additionally, ancestors were also revered and considered to be protectors and guides. These beliefs and practices were widespread across different West African cultures.