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.
