Which of the following is an effect of the automatic alarm system during a fire emergency?

The effect of the automatic alarm system during a fire emergency primarily involves alerting both emergency services and occupants. This is crucial for ensuring a quick response from firefighters and other first responders, who can address the emergency more effectively when they are informed promptly. The alarm system serves to notify individuals in the building that there is a fire or potential danger, allowing for timely evacuation and reducing the risk of injury or loss of life.

While other functions such as controlling smoke spread, reporting structural damage, and initiating evacuation routes are important aspects of fire safety and emergency management, they do not fall directly under the primary function of an automatic alarm system. The main role of the alarm is to alert and mobilize necessary resources in response to a fire incident, making this the central effect of the system during such emergencies.