Which of the following is NOT a source of surface water?

Surface water refers to water that collects on the surface of the ground, including in lakes, rivers, reservoirs, and other bodies of water. Lakes are natural basins filled with water, rivers are flowing bodies of water that typically connect various water bodies, and reservoirs are man-made or designated lakes used for storing water, often created by damming rivers.

Underground aquifers, in contrast, are geological formations that can store significant amounts of water, but this water is located below the earth’s surface. Aquifers serve as sources of groundwater, not surface water. Therefore, identifying underground aquifers as not being a source of surface water is accurate, as they feed springs and wells rather than contributing directly to bodies of water visible at the ground's surface. Understanding the distinction between groundwater and surface water is crucial in environmental health and resource management, influencing decisions related to water usage, conservation, and pollution control.