Final answer:
The manager's behavior exemplifies interactional justice, which focuses on fair communication and treatment within an organization.
Step-by-step explanation:
The manager's behavior of taking time to explain to a subordinate why they did not get a promotion and sincerely listening to their concerns is an example of an attempt to act ethically according to interactional justice. Interactional justice is concerned with the fairness and transparency of the communication and treatment between individuals in an organization. By providing an explanation and giving the subordinate an opportunity to express their concerns, the manager is demonstrating a commitment to fairness and respect.