What system aids in the indication of system alerts and failure warnings?

The Engine Indication and Crew Alerting System (EICAS) is the correct answer because it is specifically designed to inform the flight crew of the status of various systems on the aircraft. EICAS provides real-time data on engine performance, system statuses, and alerts for any malfunctions or failures that may occur during flight. Through visual and auditory alerts, it helps the crew to quickly identify issues and respond accordingly, enhancing safety and decision-making.

In contrast, the Flight Management System (FMS) primarily focuses on navigation and flight planning, aiding pilots in managing flight trajectory but not directly addressing alerts and warnings related to system malfunctions. The Traffic Collision Avoidance System (TCAS) is essential for avoiding mid-air collisions and does provide alerts, but its functionality is centered specifically on traffic advisories rather than system status alerts. The Inertial Reference System (IRS) supplies critical information regarding the aircraft's position and orientation; however, it does not alert the crew about system failures or provide warning indications like EICAS does.