What are some positive effects of columbian exchange & exploration ?

answer; /// i do believe that its napolean's conquest of spain;

i don't think it's c or d. i think it's either a or b.

hope this .

copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.

stories were past on to people they were told too who told it to the next and so on. hope this