What were the improvements and influential individuals from 1820-1850 in the United States and what impact did they have on society?

During the 1820-1850 the American Economy. Owing to industrialization, immigration, geographical expansion, new technical developments and other factors, the U.S. had a turbulent, but the significantly growing economy in the 19th century.

Explanation:

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.