<span>The composition of the Earth and the processes that are changing it</span>
Answer: At its height the empire encompassed most of southeastern Europe to the gates of Vienna, including present-day Hungary, the Balkan region, Greece, and parts of Ukraine; portions of the Middle East now occupied by Iraq, Syria, Israel, and Egypt; North Africa as far west as Algeria; and large parts of the Arabian.
Explanation:
<span>he dominant social system in medieval Europe, in which the nobility held lands from the Crown in exchange for military service, and vassals were in turn tenants of the nobles, while the peasants were obliged to live on their lord's land and give him homage, labor, and a share of the produce, notionally in exchange for military protection.</span>
