Final answer:
Maize was first grown by people in northern Peru.
Step-by-step explanation:
The correct answer is B. Maize, or corn, was first grown by people in northern Peru.
According to historical records, maize was domesticated from a wild grass called teosinte in the region that is now northern Peru between 5000 and 3000 BCE. This process involved human intervention, transforming the grass into the plants we know today. Maize became an important staple carbohydrate in Mesoamerica and eventually spread to other parts of the Americas.
Therefore, option B is the correct answer.