Which type of control would be classified as "administrative"?

Administrative controls are strategies or measures aimed at managing risks and ensuring safety through policies, procedures, and practices rather than relying on physical equipment or barriers. Safety training sessions fall under this category because they involve educating employees about potential hazards, safety protocols, and proper work practices to reduce risks. By providing training, organizations can equip their workforce with the knowledge and skills necessary to identify and mitigate hazards effectively.

In contrast, other options involve physical or engineering controls. For instance, guardrails and barriers (another choice) physically prevent accidents, while PPE (personal protective equipment) usage provides a personal safety measure but does not alter the work environment or workflow process. Replacing hazardous materials is an engineering control is a proactive measure aimed at changing the materials used in a process to eliminate risk.

Thus, safety training sessions represent the concept of administrative control, emphasizing preventative measures through instruction and policy enforcement rather than physical alterations to the environment.