All industry is made up of four sectors that are a linked together like a chain: primary, secondary, tertiary and quaternary industry. Industries in the primary and secondary sectors are the ...
Primary agricultural ... nature or from the primary sector. Secondary agricultural goods are treated products and preparations from primary agricultural goods. Together, these form the main definition ...
All industry is part of a chain that starts ... developed countries. The tertiary sector includes the selling of the goods that have been produced in the primary and secondary sectors.
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