Which of the following is one way to increase the risk of injury in linework?

In linework, phase-to-phase contact significantly increases the risk of injury due to the potential for electric shock or arc flash. When a lineman inadvertently comes into contact with more than one phase of an electrical system, it creates a direct path for electrical current, which can lead to severe injury or even fatality. This risk is magnified in high-voltage environments, where the electrical energy involved is considerable.

In contrast, working alone does present risks, particularly regarding safety checks and the ability to manage emergencies, but it does not inherently increase the electrical hazards associated with physical work on live lines. Using insulated tools is essential to minimize the risk of electrical shock and enhance safety when working near energized conductors. Proper grounding is a critical safety practice designed to protect workers by ensuring any stray currents are safely directed away from personnel and equipment. Thus, the nature of phase-to-phase contact represents a direct and immediate hazard that can lead to serious injury in linework situations.