The correct answer is: Aqueduct.
An aqueduct is a bridge that carries water across a valley or other low-lying area. It is typically made of stone, concrete, or metal, and it has a large, open channel that allows water to flow through it. Aqueducts are often used to transport water from a source, such as a river or lake, to a destination, such as a city or town.
A syphon is a type of pipe that carries water or other liquids over an obstacle by using the principle of atmospheric pressure. A syphon is typically used to transport water from a lower level to a higher level, and it is often used in irrigation systems.
A super passage is a type of bridge that carries a road or railway over a valley or other low-lying area. It is typically made of concrete or steel, and it has a large, open deck that allows vehicles or trains to pass over it. Super passages are often used in mountainous areas, where there are many valleys and other low-lying areas.
A syphon-aqueduct is a type of structure that combines the features of an aqueduct and a syphon. It is typically used to transport water over a long distance, and it is often used in irrigation systems.