The correct answer is : b. Waterwheel for irrigation.
The first clear description of a waterwheel for irrigation was given by Roman architect <em>Vitruvio </em>around 4000 B.C during Roman times. Although some texts mention Mesopotamia and Alexandria as its invention sites.
Hydraulic energy usage dates from the Greeks, whom employed the waterwheel invented by Philo of Byzantium in the third century B.C. The Egyptians and Romans afterwards, which were great voyagers and architects, improved the waterwheel and conduits, needing human strength to turn the wheel.
Roman architect Marco Vitruvio discover the horizontal axis waterwheel, which was used mainly for crop irrigation, to supply water to villagers and to grind grains.
Answer: I am pretty positive that the answer is A. She worked as a spy for the North.
Explanation:
Most believe America’s nuclear arsenal restrained the Soviet Union throughout the Cold War.
Answer:
The Black Death was a devastating global epidemic of bubonic plague that struck Europe and Asia in the mid-1300s. The plague arrived in Europe in October 1347, when 12 ships from the Black Sea docked at the Sicilian port of Messina.
Explanation:
In the late 1800s, workers organized unions to solve their problems. Their problems were low wages and unsafe working conditions. The solution was for the work- ers to cooperate and form unions. First, workers formed local unions and later formed national unions.