What is the Tertiary level of economic activity? What are some examples of jobs at this level? What would the level of development be for a country with the majority of its jobs in this sector?

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Answer(say);

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion

Cthat is the answer