What body of water was important to both mali and Songhai? The Senegal river or the niger river?

The Niger River was the significant body of water that was important to both the Mali and Songhai Empires. It served as a crucial artery for trade, transportation, and agriculture, helping to sustain these empires during their respective periods of power in West Africa. The Niger River facilitated connections between various towns and cities within the empires, and it was also a critical link to other regions, allowing for commerce and cultural exchange.