Answer:
Economic:
- Traded gold for salt (Ghana, Mali, and Songhai)
Political:
- Separated into clans/King's clans were the wealthiest (Ghana)
- Dyula was made up of Muslim merchants (Mali)
- Sonni Ali expanded the Songhai Empire (Songhai)
Social:
- Dyula established settlements and contributed to the spread of Islam and trade (Mali)
- Established a social hierarchy (Songhai)
Explanation: