Answer:
It's economy droped.
Explanation:
During WWII a lot of money went for weapons, and by the end of it and we entered the Great Depression cause of it.
According to the writings of Vitruvius, the Greek mathematician Archimedes created a primitive elevator in 236 B.C. that was operated by hoisting ropes wound around a drum and rotated by manpower applied to a capstan. In ancient Rome, a subterranean complex of rooms, animal pens and tunnels stood beneath the Colosseum. At various intervals, elevators powered by hundreds of men using winches and counterweights brought gladiators and large animals up through vertical shafts into the arena for battle.
In 1743, Louis XV had what was referred to as a “flying chair” built to allow one of his mistresses to access her quarters on the third floor of the Palace of Versailles. Similarly, a “flying table” in his retreat château de Choisy allowed the king and his private guests to dine without intrusion from the servants. At the sound of a bell, a table would rise from the kitchen below into the dining room with an elaborate meal, including all of the necessary accoutrements.
By the mid-19th century, elevators powered by steam or water were available for sale, but the ropes they relied upon could be worn out or destroyed and were not, therefore, generally trusted for passenger travel. However, in 1852, Elisha Graves Otis invented a safety break that revolutionized the vertical transport industry. In the event that an elevator’s hoisting rope broke, a spring would operate pawls on the car, forcing them into position with racks at the sides of the shaft and suspending the car in place. Installed in a five-story department store in New York City in 1857, Otis’ first commercial passenger elevator soon changed the world’s skyline, making skyscrapers a practical reality and turning the most valuable real estate on its head—from the first floor to the penthouse.
The answer is D. Farming settlements in the Indus Valley River began being established in 4000 BCE.
In his book "Looking Backward", Bellamy tells the story of Julain West, a young American who lived in Boston towards the end of the 19th century (1887). During this period, industrialization was affecting all economic activities, as developments made manufacturing sites more productive and there was also a growing need for a labor force, as the growth of industry was exponential. Throughout all of this process, owners of these businesses were getting very rich.
One night, Wells falls asleep and wakes up 113 years later. He sees Boston as a city who suffered a dramatic change. Technological developments could be seen everywhere. He later learned that the country had adopted a socialist model which was fully executed. Enterprises were run and organized by a central office and labor was distributed by an organization called "The industrial army", who effectively assigned labor resources among the industries.
The book had great reception. Bellamy was praised by many unions, including the American Federation of Labor and The Knights of Labor, which saw the book as a reference on how industrial matters should be managed in the country.
