Which geographic factor enabled the cities of Nanjing and Mogadishu to develop into powerful trading centers?

Nanjing and Mogadishu developed into powerful trading centers primarily due to their strategic geographic locations. Nanjing, situated along the Yangtze River, provided access to inland trade routes, facilitating commerce between the interior of China and the eastern coast. Similarly, Mogadishu's location on the Indian ocean allowed it to become a vital hub for maritime trade, connecting East Africa with the Arabian Peninsula and beyond. These advantageous positions enabled both cities to thrive economically and culturally through trade.