Which of the following is a structural anchor component?

A structural anchor component is a stable and reliable point from which a rescue system can be secured. Major building components, such as beams, columns, or other integral parts of a structure, provide significant strength and stability, making them ideal for use as anchors. These components can typically withstand considerable forces without failing, which is crucial for the safety of a rope rescue operation.

In comparison, while trees, vehicles, and large rocks may sometimes be used in certain scenarios for anchoring, they may not always provide the necessary reliability or stability. Trees can have varying strengths based on species and health, vehicles may not be securely positioned or may be subject to movement, and large rocks can be unstable or unpredictable. Therefore, major building components stand out as the safest and most effective choice for structural anchoring in a rope rescue context.