The plague came from the fleas on the rats and the rats traveled through ships and merchants ship coming from other countries. Once the rats with the fleas reached a city heavily populated, mass amounts of people died because the disease was contagious. To add to that the cities were extremely dirty and had dead people everywhere.
C --------> Guide to congressional appropriations process!
It made it possible to do stuff
Answer:
Option: c. Sewer
Explanation:
Sewer plays a key role in collecting wastewater from human populations more effectively than in the past. Before, the emergence of cities, there was no proper procedure to collect the wastewater in America, which ultimately affected the environment and underground water. As cities began to take shape in America with a larger population, the sewage system came in the late 1850s in Chicago and Brooklyn.
The wealth that is produced by selling the oil are creating powerful elites and also a big gap between the rich and the poor and this best describes a challenge in the Middle East resulting from oil production. A category of people in the Middle East are living a lavish life, while others are struggling to get their daily bread.
