Concept:The fall of the Songhai Empire resulted from internal political decay combined with external military pressure.
Explanation:By the 16th century, the Songhai Empire faced serious internal unrest, including power struggles and succession disputes.
At the same time, external attacks increased, especially the Moroccan invasion of 1591.
The Moroccan army used superior firearms and defeated Songhai forces at the Battle of Tondibi.
Internal weakness made it difficult for the empire to resist these external attacks effectively.
Therefore, the decline was caused by a combination of internal disorder and foreign military pressure.
Answer:A. Internal unrest and external attacks