What is the key advantage of an automatic fire alarm system compared to a manual one?

An automatic fire alarm system's primary advantage lies in its capability to detect fire without the need for manual activation. This feature significantly enhances safety, as it allows for immediate response in case of a fire, even if no one is present to activate the alarm. The system uses various sensors to monitor for signs of fire, such as smoke or heat, and can alert occupants and emergency services automatically.

This automated response is crucial in situations where every second counts, potentially saving lives and minimizing property damage. In contrast, manual systems depend on individuals to recognize a fire and trigger the alarm, which could lead to delays and increased risks. The other options pertain to aspects of operation, cost, and maintenance, which do not capture the distinct life-saving advantage of automatic detection inherent to these systems.