Final answer:
The Aqua Tower's sway in windstorms is reduced by a tuned mass damper, a technological solution used in skyscrapers to counteract oscillations due to winds and seismic activity.
Step-by-step explanation:
The detail that reduces the Aqua Tower sway in windstorms is the tuned mass damper. When buildings are built taller, they behave much like inverted pendulums, and the top floors can oscillate due to seismic activity and fluctuating winds. The Aqua Tower utilizes a tuned mass damper system to counteract this effect, with the Comcast Building serving as an example where a tuned, liquid-column mass damper is installed at the top of the building. The presence of tuned mass dampers in skyscrapers is a significant engineering solution that contributes to the overall stability of these towering structures, ensuring they withstand the forces of nature more effectively.