Answer:
first para could be about where the black death originated from (gobi desert, mongolia) and how it came into Europe (rats brought it over with the sailors). Second para could be about how the trade routes continued to spread the disease throughout Europe and Asia ( look on Wikepedia for more on it). And the last paragraph could be about how long it took for the disease to travel and how it spanned over a course of 6 years. I hope this helps?
Explanation:
