By force. The Spartan soldiers would make annual raids/attacks on the Messenian Helots mainly to threaten them into submission, but also as military practice.
Answer:
The Columbian Exchange caused population growth in Europe by bringing new crops from the Americas and started Europe's economic shift towards capitalism. Colonization disrupted ecosystems, bringing in new organisms like pigs, while completely eliminating others like beavers.
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The correct answer is A. Religious systems that included sacrifice rituals.
Explanation:
Ancient civilizations shared many common features including social stratification or the creation of artistic and architectural elements. However, sacrifice ritual was not a common feature civilizations such as Mesopotamia, Mesoamerica, etc. shared. Indeed, sacrifice rituals including human sacrifice rituals existed in cultures such as the Aztecs in Mesoamerica but this was not a generalized practice or a basic element found in the first human civilizations. Moreover, this practice was linked to specific religious beliefs. According to this, the correct answer is A.
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