·plants were spread from one continent to another. · animals and diseases were introduced to new areas. · populations were destroyed by foreign contact. · the process began in the late 15th century. all of these are describing a) the silk roads. b) scientific discovery. c) the columbian exchange. d) circumnavigation of the world.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean

i think it’s a i hope that right : )