The Village of Secoton in Roanoke, painted by Governor John White c.1585. (CC0)Which of the following developments was the most direct effect of the spread of maize cultivation from Meso America into North America?Elimination ToolSelect one answerAMore cities experienced population growth.BThe populations of bison, moose, and deer increased as hunting declined.CIt caused unity among Native Americans to increase.DIt led to Aztec expansion into the Mississippi Valley region.

The most direct effect of the spread of maize cultivation from Meso America into North America was that more cities experienced population growth.

Here's why:

Maize, also known as corn, was a staple crop that was easy to grow and provided a reliable food source. This allowed societies to settle in one place, as they no longer had to follow herds of animals for food. As a result, these settled societies were able to grow and develop into cities.

The other options are less directly related to the spread of maize cultivation. While it's possible that the populations of bison, moose, and deer increased as hunting declined, this is more likely a side effect of the shift from hunting and gathering to agriculture.

The spread of maize cultivation may have led to increased unity among Native Americans, but this is a more indirect effect.

Finally, the spread of maize cultivation did not lead to Aztec expansion into the Mississippi Valley region. The Aztecs were located in what is now Mexico, and there's no evidence to suggest that they expanded into the Mississippi Valley region as a result of maize cultivation.