a. building the Berlin wall
hope this helps
<span />
Answer:
I don't know much about this, but here's something:
The Byzantines were Orthodox Christians and disagreed with the Catholic Church. For instance, unlike Catholics, they don't believe in Purgatory.
Explanation:
The food sources of Native Americans of the North and Northwest differed from that of Natives that lived in the West and Southwest due to the impact of climate which determined the types of food that were available. People in the North and Northwest did not farm. Irrigation allowed the people in the west to farm in dry areas.
It was introduce by Arab government
