Where did the government of early African empires have in common?

Ancient Ghana ruled from around 300 to 1100 CE. The empire first formed when a number of tribes of the Soninke peoples were united under their first king, Dinga Cisse. The government of the empire was a feudal government with local kings who paid tribute to the high king, but ruled their lands as they saw fit.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.