I really need help with this question so please help Write about the important points that the Columbian exchange has had in our world. (3 full sentences)

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

answer; i believe its (cpr);

d. hip hop

it was originated in the 70s while the harlem renaissance occured in the 1920s