The initiation of a Mayday immediately upgrades the additional resource response by how many alarms?

The initiation of a Mayday call is a critical action taken by firefighters when they are in an emergency situation, such as becoming trapped or lost. This call immediately signals the need for increased assistance and resources, ensuring that those in danger have access to the help they need.

In this case, the correct answer is the upgrade of the additional resource response by one alarm. This upgrade signifies that while the situation has escalated to a critical level, the response system is structured to efficiently mobilize necessary resources without overwhelming the incident command. By increasing the response by one alarm, it allows for a controlled and effective response, ensuring that support is available quickly while still managing the overall response capabilities.

This structured increase in alarm indicates a balance between readiness and resource management, allowing responders to act promptly without resulting in chaos during a critical situation.