What is the role of a Traffic Resolution Advisory?

The role of a Traffic Resolution Advisory is to instruct pilots to make specific altitude changes, either climbing or descending, in order to maintain safe separation from other aircraft. This advisory is crucial for enhancing safety in busy airspace, helping pilots avoid potential mid-air collisions. By providing timely instructions regarding altitude changes, this advisory assists pilots in responding to traffic conflicts effectively.

In contrast, the other options represent different types of advisories or information that do not align with the specific purpose of a Traffic Resolution Advisory. For example, alerts about potential delays, recommendations based on weather conditions, and estimated time of arrivals relate to operational and planning aspects of flight but do not pertain to immediate traffic management and resolution.