(Question in picture) also the subject is not geography

The first and the last question are the most relevant to the graph it’s self. The first question talks about the numbers dropping which would help clarify. The last one would help clarify what is producing these numbers. The second and fourth one are irrelevant to the graph. The third would also not be correct just because we don’t have enough information. I hope that helps!

Cause of he different elevations  hope this ?

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