Answer:
Core countries are economically advanced, while peripheral countries have low incomes
Explanation:
The world-systems theory aims to analyze the world in a global perspective. It argues that the globe is immersed in a capitalist economic system in which all countries share the principle of the division of labor.
Howerver, there many differences among nation-states. Some states have more advanced technology, a higher-skilled labor force, and more capital. These countries are called core countries, for example: the United States, Germany, Japan.
Other countries are tecnologically primitive, do not have a lot of capital accumulation, and focus on labor-intensive jobs such as agriculture, and in the extraction of raw materials or commodities. These are the peripheral countries. Examples of these countries are: Nigeria, India, Ethiopia, Bolivia and Guatemala.