Final answer:
The first-line supervisor should ensure that any topic of interest is part of HR's responsibilities and determine who in HR would be the best person to approach.
Step-by-step explanation:
The first-line supervisor should ensure that any topic of interest is part of HR’s responsibilities and determine who in HR would be the best person to approach. This means that the supervisor should have contact with the human resources (HR) department to address any employment-related questions or concerns. Promptly sending employees to HR without first assessing if the topic falls under HR's responsibilities may result in inefficiencies and miscommunication.