When working in locations high off the ground, the area should be:

When working at elevated locations, ensuring safety in the area is of utmost importance. The correct answer emphasizes a comprehensive approach to safety, as it includes multiple layers of precautions that can help minimize risks associated with working at heights.

Having the area all clear of tools and materials helps prevent tripping hazards and ensures that nothing falls from above, which could cause injury to individuals below. Marking the area with safety signs serves to communicate hazards and inform others that they should stay clear or take additional precautions. Assigning a spotter provides an extra eyes-on-the-ground perspective, enabling the identification of potential risks and facilitating communication with workers at height.

Each of these elements contributes to a safer working environment when dealing with work at height, making it essential to adopt a combination of strategies rather than relying on a single measure. Therefore, choosing a holistic safety approach by incorporating all these strategies is critical in promoting safety and preventing accidents.