The kingdom was rich in gold and other minerals such as iron, following the decline of Meroe.In addition, the kingdom naval power necessitated it to offer ferry services for goods to and from Rome and India. the kingdom more also had a very good harbor at Idris.
B .international trade along the east africa coast led to intermarriages,introduction of new products,money economy,architecture and rise of new people such as the Swahili
The main way in which the separation of powers guards against tyranny is by making it impossible for any single branch to become too powerful, since each branch "checks and balances" the others out when it comes to making and enforcing legislation.
Answer:
they were used to mark the period of events that happen during those times
Explanation: