A transcript from an environmental anthropology conference features a presentation discussing the revival of ancestral amunas—pre-Incan mountain water infiltration channels—in the Andean highlands above Lima:
"For centuries, pastoral communities across Huarochirí engineered infiltration trenches that intercept seasonal rains along high-altitude ridges, diverting surface runoff into fractured subterranean aquifers rather than allowing torrential loss down steep valleys. This slow subterranean filtration delays water emergence in low-lying valley springs by several months, precisely replenishing community irrigation and municipal reservoirs during severe dry seasons. Modern municipal water authorities initially dismissed this pre-Columbian infrastructure as obsolete compared to concrete mega-dams. However, recent scientific modeling demonstrates that rehabilitating these ancestral channels provides cost-effective, decentralized hydrological buffering while simultaneously revitalizing indigenous communal governance systems. Rather than viewing ancestral knowledge as a static relic, contemporary urban planning increasingly recognizes that community-maintained green infrastructure is indispensable for long-term urban water security."
Which of the following best expresses the main theme of the presentation?
- AConcrete dams and municipal engineering projects have proven entirely ineffective across high-altitude mountain environments.
- Integrating traditional indigenous water infiltration techniques into contemporary resource management offers an ecologically sustainable and community-centered solution to regional water scarcity.Answer
- CThe speaker expresses skepticism toward municipal planners who attempt to integrate scientific modeling into traditional farming practices.
- DAncestral infiltration channels are preserved exclusively to maintain historical folklore and indigenous ceremonial practices rather than practical ecological functions.