Humans have survived and thrived in Mexico City by using technology to create greater access to land. When the Spanish conquered the Aztec capital, Tenochtitlan, in the 16th century, they built Mexico City by draining the lakes and filling in the lake water to create more arable land for agriculture. This technique of land reclamation has continued to be fundamental to human civilization in Mexico City. The construction of canals and tunnels to transport water out of the valley also has supported land reclamation. The construction of Chinampas, artificial islands to grow food and hillside terraces for water storage and agriculture, is an additional innovative technique that has created more productive land that allows for human survival.
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option A. alexander the great destroyes as entire empire himself
Because every business , farm , shop , steel works , mine and bank was owned by the state.
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The Constitution thus protected slavery by increasing political representation for slave owners and slave states; by limiting, stringently though temporarily, congressional power to regulate the international slave trade; and by protecting the rights of slave owners to recapture their escaped slaves.
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1. Vietnam is divided into two countries
2. The Viet Cong start a resistance against Ngo Dinh
3. President Johnson escalates US involvement in the war
4. Vietnam is unified under a communist government
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