* General overview: Ancient aqueducts were remarkable feats of engineering that provided crucial water supplies to burgeoning cities and empires.
* Focus on engineering: The ingenuity of Roman aqueduct design, utilizing gravity and carefully graded channels, remains a testament to their advanced understanding of hydraulics.
* Focus on societal impact: Aqueducts were not merely conduits for water; they were essential infrastructure that facilitated the growth, sanitation, and prosperity of ancient civilizations.
* Focus on a specific aqueduct: The Pont du Gard, a towering testament to Roman engineering prowess, stands as a lasting symbol of the sophisticated aqueduct systems that shaped the Roman Empire.
Choose the topic sentence that best fits the overall point you want to make in your paragraph.