Answer:
On africas eastern port lay the rich city-state of kilwa
Step-by-step explanation:
Kilwa is a historic Swahili coastal town in Tanzania, known for its rich history as a trading hub along the Indian Ocean. Characterized by its impressive architecture, including intricately carved coral stone buildings, Kilwa boasts remnants of medieval settlements and trading posts, showcasing its significance in East African trade networks. Its UNESCO-listed ruins are a testament to its once-thriving maritime and commercial prominence.