Ghana's decline was by invasion, overgrazing, and internal rebellion. The Almoravids a group of invaders caused the first and second one. The last one was caused by the villages that Ghana controlled.
The lack of money led to their decline.
3 factors that led to the end of feudalism was the bubonic plague, the hundreds' years war, and the magna carta
Drought and a decline in trade
France and england
The plague, and wars.
France and england
France and england
Hunting and habitat loss may have led to a a decline in the number of black bears, but they are not endangered or threatened.
The period of disorder after the decline of the Roman Empire led to an extended period of disunity during the Middle Ages that was characterized by feudalism.
The Huns
A conquistador named Hernan Cortes.
The short answer is: infighting and the plague.