Final answer:
The double aqueduct system that provided Tenochtitlan with fresh water was an achievement attributed to Aztec ruler Moctezuma I, reflecting the advanced engineering and infrastructure of the time.
Step-by-step explanation:
The remarkable double aqueduct pipe system which supplied the Aztec capital, Tenochtitlan, with fresh water was one of the significant achievements of the Aztec civilization. This construction, showcasing the ingenuity and innovation of the Aztec people, can be attributed to ruler Moctezuma I.
He reigned during a period when the Aztec empire saw considerable expansion and urban development, including the establishment of codified laws, market structures, and immersive building projects such as new pyramids and infrastructure crucial for the thriving trade and organization of society. The aqueducts were part of the wider efforts to support a sustainable urban environment within the island city, contributing to the city's status as a marvel of engineering at the time.