Final answer:
Water control facility restoration is a primary example of ecological restoration, which involves returning ecosystems to their original or healthy state after damage or degradation.
Step-by-step explanation:
The restoration of water control facilities is a primary example of ecological restoration. Ecological restoration is the practice of returning an ecosystem to its original state or a healthy, functioning state after it has been degraded or damaged. In the case of water control facilities, the restoration involves improving the water flow, quality, and ecosystem functions of rivers, streams, and other water bodies.