Answer :
b. The exchange of plants, animals, diseases and technologies between the Americas and the rest of the world following Columbus's voyages.
A large variation of different crops and animals were able to pass through these two areas and this then grew and populated on the other side it was sent to in big numbers.
A large variation of different crops and animals were able to pass through these two areas and this then grew and populated on the other side it was sent to in big numbers.