With the exception of some oil-rich economies, countries with large primary sectors of the economy have GDPs per capita lower than countries with large tertiary sectors.
Under production, the primary sector of an economy includes all those activities the end purpose of which consists in exploiting natural resources: agriculture, fishing, forestry, mining, deposits.
Under production, tertiary sector provides all services to businesses and consumers by selling the goods being manufactured by companies in the secondary sector. Its encompassing medical providers, educators, financial services, haircuts, personal trainers etc.
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