Final answer:
The subject of this question is History. The Olmec culture emerged as the first Mesoamerican civilization after people settled in the valley of Mexico and learned how to farm.
Step-by-step explanation:
The subject of this question is History. The question pertains to the first Mesoamerican civilizations and their origins. The Olmec culture emerged as Mesoamerica's first complex civilization after people settled in the valley of Mexico and learned how to farm.
The Aztecs, who settled in the swampy land near Lake Texcoco, became a powerful civilization with a sophisticated irrigation system. The Aztecs, who settled near Lake Texcoco, became a powerful civilization with an advanced irrigation system.