The answer is a. corn. Southern colonies have fertile soil for easy to grow crops.
The imaginary line that divides the earth into in this case the north and south hemispheres is called the Equator and it passes through Ecuador and actually Ecuador is the Spanish word for Equator. The French explorer La Condamine spent 10 years in Ecuador studying the equator and determined the oblate spheroid shape of the world.
Plague is an infectious disease caused by bacteria called Yersinia pestis. They are found mainly in rodents, particularly rats, and in the fleas that feed on them.
So the Answer is Animals