Which of these statements describes the economy that emerged within aztec cities

Residents with an abundance of one product traded it for other products.

Explanation:

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.

the quote by walter cronkite contributes to the central idea of the text by supporting the central idea. cronkite argues that what is deemed “right” for and in america may not be good for other countries. this supports the central idea of the text, that the vietnam war was unpopular in america for multiple reasons- including cronkite’s.