When performing overhead work on scaffolding, what protective measure must be taken to prevent objects from falling and striking a person below? install barricade hazards enable alarm systems post warning tags on the scaffold use toeboards, debris nets or canopies

## Step 1<br />This problem is about safety measures when performing overhead work on scaffolding. The goal is to prevent objects from falling and potentially injuring someone below. The options provided are:<br />- Install barricade hazards<br />- Enable alarm systems<br />- Post warning tags on the scaffold<br />- Use toeboards, debris nets or canopies<br /><br />## Step 2<br />The first three options, while they may contribute to overall safety, do not directly address the issue of preventing objects from falling. <br /><br />## Step 3<br />The last option, "use toeboards, debris nets or canopies", directly addresses the issue of preventing objects from falling. These tools are specifically designed to catch falling objects, thus preventing them from hitting someone below.