Final answer:
Teotihuacan was a major city in Mesoamerica known for its large population, trade, and advanced architecture.
Step-by-step explanation:
Teotihuacan was a major city in Mesoamerica during the Classic Mesoamerica period. It was known for its large population, estimated to be more than 100,000 at its peak in 500 CE. Teotihuacan was a center of trade and manufacturing, controlling the market for high-quality obsidian. The city's structures, such as the Pyramid of the Sun and the Pyramid of the Moon, reflect the advanced architectural skills of its inhabitants. The influence of Teotihuacan extended to other regions of Mesoamerica and lasted even after its decline.