In arid regions of western India, ancient stepwells, known as *baoris*, served as multi-story subterranean water-harvesting systems. Beyond their primary function of collecting monsoon rainwater, these structures were designed to provide relief from the intense summer heat. Architecturally, stepwells descend deep into the earth, which shields the lowest pool of water from direct sunlight and wind. Because of this subterranean design, evaporation is significantly reduced compared to open reservoirs, allowing the pooled water to remain relatively cool throughout the dry season. Additionally, the masonry galleries built along the descending steps create shaded, ventilated zones where travelers and local communities could gather to escape the heat.
Based on the text, what is one reason why the water in a *baori* remains cooler than that in an open reservoir?
- AThe water in the stepwell is cooled by underground aquifers that feed into the lowest pool.
- BLocal communities actively filtered the monsoon rainwater stored in the pools to make it potable.
- The subterranean construction of the stepwell reduces the rate of water evaporation.Cevap
- DThe masonry galleries block all wind from entering the subterranean chambers.