Answer:
The Songhai people settled along the Niger River during the Songhai Empire mainly because the river provided a number of important resources and advantages. First, the Niger River was a source of fresh water, which was essential for irrigation and the growth of crops. The river also provided a means of transportation, allowing the Songhai people to trade with other cultures and expand their empire. In addition, the river was home to a variety of fish and other animals, providing a source of food for the Songhai people. Finally, the river's floodplains were fertile, making them ideal for agriculture. For these reasons, the Niger River was an attractive location for the Songhai people to settle.