Which environment change played a key role in making human survival easier and bringing about the neolithic age? decline in global sea levelend of the ice ageextinction of mammoths increase in cave formations

c

Explanation:

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attacks by the seljuk. a devastating blow to the entire byzantine world was dealt by christian crusaders from the west. the venetians were eager to destroy byzantine power and offered the crusaders money, ships, and part of the spoils of war.

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