The correct answer to this open question is the following.
Compare the rise of complex societies and empires in Mesoamerica and South America to those of Afro Eurasia
The comparison would be the following.
Two important cultures dominated the Americas. We are talking about the Aztec civilization and the Maya civilization. The Mayas settled in the Yucatan peninsula of México and some territories of Guatemala and Belize. They collapsed by the 900s.
The Aztec Empire settled in the Texcoco Lake to found the great city of Tenochtitlan(modern-day downtown Mexico City). Both civilizations built impressive pyramids, temples, and buildings. The Mayas were f¿great astronomers, while the Aztecas were great warriors and traders.
At the cusp of the Aztec Empire, 200,000 people lived in the great Tenochtitlan. Meanwhile, in London, there were 50,000 people.
Tenochtitlan a sophisticated place and an engineering wonder. The Aztecs built water canals for transportation of people and products from and to the city and connected to close towns such as Mixcoatl, Tlatelolco, Tepeyac, or Coyoacan. In the middle of the canals, they built "chinampas," portions of land were they liven and grew crops.
In that time, when the Aztecs had water canals and a sewerage system, the Roman Empire suffered from the bad odor produced by the black waters and lack of sewerage system in Rome.
In South America, the Inca Empire ruled over most of the Andean lands, until the Spanish conquerors arrived.
In Africa, the tribes did not reach the level of knowledge and advancements that could be seen in Mesoamerica.
