Which of the following is a characteristic of unsafe work performance?

The choice highlighting the use of uninsulated tools near energized parts is a clear example of unsafe work performance because it exposes workers to significant electrical hazards. Tools that are not insulated do not provide a safe barrier against electrical currents, increasing the risk of electric shock or electrocution if they come into contact with live components. This practice directly contradicts essential safety measures in an electrical work environment, which emphasize the importance of using the appropriate protective equipment and tools designed for work with energized systems.

In contrast, the other choices embody practices that are foundational to maintaining a safe working environment. Regular tool maintenance ensures that equipment is in good working order, following established safety guidelines promotes adherence to best practices, and comprehensive safety training equips workers with the knowledge and skills necessary to recognize and mitigate risks. Thus, using uninsulated tools in close proximity to energized parts stands out as a particularly dangerous behavior indicative of unsafe work performance.