The conclusion that can be drawn about the level of economic development in countries with different specializations in a commodity chain is:
Quaternary sector specializations would earn the highest wages.
This is because the quaternary sector, which focuses on knowledge-based activities involving services such as research and development, financial services, education, and information technology, typically provides higher wages compared to the primary (extraction-based), secondary (manufacturing), and tertiary (service-based) sectors. Countries that are more developed tend to have a larger share of their economy in the quaternary sector, reflecting a higher level of economic development and innovation.