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
I'm not 100% sure... but I would say B.
Answer:
B
Explanation:
A is incorrect because the Appalachians are not jagged and point
C is incorrect because erosion/deposition would do this
D is incorrect because weathering does not affect tectonic plates
