Anchor lines shall be attached to which of the following?

Anchor lines are typically attached to buoys because they serve to moor the buoy and provide stability in water bodies. Buoys are floating devices that mark locations, provide navigation assistance, or delineate areas, and they need anchor lines to maintain their position against currents or wind. This anchoring is essential for the proper functioning of various water management systems, including stormwater management applications where buoys may be used to mark areas of interest.

Using anchor lines on buoys ensures that they effectively communicate important information or boundaries, which is crucial in preventing potential hazards for boating or navigation and in managing stormwater facilities. Thus, the attachment of anchor lines to buoys is a best practice to ensure they remain in the desired position, making it the correct choice in this context.