The selva is what kind of region
a; flat and marshy
b: mountainous and snowy
c: forest and tropical
d: barren and dry

It is Forest and Tropical .. Selva actually means "a rain forest in a tropical area"
Just a helpful hint.. hope this helps!

Maybe a horizontal because its a pattern

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