Which of the following about middle-income nations is true? middle-income nations are generally more industrialized than wealthy and poor nations. they consist primarily of the nations of north america and western europe; australia, japan, and new zealand; and certain other nations in the middle east and asia. middle-income nations are generally less industrialized than wealthy nations but more industrialized than poor nations. many of them were the first nations to become industrialized starting in the 19th century, when the industrial revolution began. many of these nations rely heavily on one or two crops.