What function does a tamper-resistant feature provide in smoke detectors?

The tamper-resistant feature in smoke detectors is designed to prevent unauthorized removal or disarmament of the device. This is a crucial safety measure because it ensures that the smoke detector remains in place and operational, reducing the risk of fire hazards when the detector is tampered with. By securing the device against unauthorized access, it maintains its functionality and reliability in detecting smoke or fire, which is essential for the safety of occupants in any building.

The other options do not accurately reflect the purpose of the tamper-resistant feature. For instance, a tamper-resistant feature does not make it easier to remove the detector; rather, it is specifically intended to make removal difficult. Enhancing the sound of the alarm or increasing battery life are also not functions associated with tamper resistance, as these aspects relate to the detector's alerting capabilities and energy efficiency rather than safeguarding it against tampering.