I believe that finding the balance of drones would be putting a limit on how many drones a country can use at one time. I'm not sure on the other 2 questions.
The reason behind closing of Ghettos was Typhus and typhoid fever (disease). Ghetto can be defined as a part of a city where minority people or groups used to live due to the result of social and economical pressure. The ghetto is often described as a part or specific society which is more financially weaker than other areas of the city.
Versions of the ghetto appear worldwide, each with its own name, classification, and group of people. The term ghettos was originally used for the Venetian Ghetto in Venice, Italy in 1516, to define the specific part of the city where Jews were not allowed to enter and live, thus they differentiate from other people and created their own place.
Answer:
Colombia
Explanation:
After the war, Cuba became a US protectorate and was granted independence in 1902.
Answer: Cities provided better opportunities.
Explanation: There were more jobs, leading to more opportunities to live a better life.
