Serfdom, condition in medieval Europe in which a tendency farmer was bound to a hereditary plot of land and to the will of his landlord. The vast majority of serfs in medieval Europe obtained their subsistence by cultivating a plot of land that was owned by a lord.
Answer:
Agriculture, revolts, and trade.
Explanation:
Aksum's agriculture began to collapse because of the cutting down of trees and irregular rainfall which eroded the soil. Revolts were also taking place, especially from the North.
