Which of the following title among the Igbos in the pre-colonial era required substantial wealth before one could acquire it

The title among the Igbos in the pre-colonial era that required substantial wealth before one could acquire it is the "Ozo" title. This title was one of the highest titles in the Igbo society, and it was reserved for men of great wealth and achievement. To be eligible for the title, a man had to have a certain amount of wealth, including a large number of yams and livestock, as well as a successful trading career. Additionally, he had to meet certain moral and social requirements and undergo a series of rituals and ceremonies to be initiated into the title.