Which invention revolutionized land transport by replacing the use of sledges?, The Wheel, What was the primary source of power for transport before the invention of the steam engine?, Animal Power, Which mode of transport is considered the cheapest for carrying heavy and bulky goods over long distances?, Water Transport (Shipping), What type of high-speed train uses magnets to float above the tracks to reduce friction?, Maglev Train, What do we call the network of paved roads that connect major cities and states within a country?, National Highways .

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