The correct answer is the Olmecs.
Teotihuacan was greatly influenced by the Olmecs.
The Olmecs were one of the ancient civilizations in Mesoamerica. They influenced post-Olmecs cultures like the Teotihuacans, Aztecs, and Mayans.
The Olmec’s –considered the mother civilization of Mesoamerica- influence can be seen in Teotihuacan society organization, culture, arts, and religious rites.
Teotihuacan was the largest city in pre-Columbian Americas. Anthropologist affirm that population were between 125,000–250,000 in the area
Teotihuacan is located in San Juan Teotihuacan town, just about 25 miles from Mexico City. Its beauty and the great pyramids –the Moon, the Sun and Quetzalcoatls pyramids- made Teotihuacan a UNESCO World Heritage Site in 1987.