How did the boundaries of the byzantine empire change?

The Roman Empire consisted only the eastern half of the Roman Empire to begin with. During the 6th century, the Byzantine Empire expanded by conquering the vandal Kingdom in North Africa, and some part of Spain and Italy. The empire slowly lost its Spanish and Italian ownership, and for a time, many of the near eastern territory to Persia as well. The Persians were beaten by the Byzantines in the early 7th century but swiftly lost their African and near Eastern possession to the Arab armies. Their empire had slowly diminished to include an essential part of the Balkans by 700 CE. Finally, when Constantinople fell in 1453, nothing was left.

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becasue in the south they disallowed slavery but in the north slavery was illegial this boilled into because mexico wanted slavery

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when studying cause and effect, historians usually group the causes into different categories. for example, cultural causes reflect how a society’s literature and art convey the way the society saw itself in relation to the rest of the world. another resource that historians use to understand society is pop culture, which tells them the trends and ideas that are preferred by the common people. when studying cause and effect, it’s important to remember multiple causation, or the idea that an effect could have several causes and vice versa.  

the correct option is “cultural causes” since art and literature are related to the culture of a place. culture is determined by literature, art, music.

the correct option is “pop culture” since it reflects the likes and ideas of common people whereas the rest of the options do not focus on common people.  

the correct option is “multiple causation” since it refers to the idea that events are caused by multiple reasons, not just a single one.