Match the landform in column 1 with the description in column 2. Niagara Falls
?
2
A major source of
hydroelectric power
Rocky Mountains
?
A volcano that grew out of
a cornfield in 1943
Paricutin
2
A natural barrier to settling
in the West

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

Empty quarter and sandy desert

Do you have the photo?