The _________ feature shuts off water when the fire is extinguished and turns on again if the fire rekindles.

The feature that shuts off water when the fire is extinguished and turns it back on if the fire rekindles is known as the recycling feature. This capability is crucial for fire suppression systems as it helps to conserve water and prevent unnecessary damage to the property. Once the sensors detect that the fire has been extinguished, the recycling feature allows the system to shut off the water supply, ensuring that resources are not wasted.

Additionally, should there be a relighting of the fire, the system is designed to reactivate the water supply automatically, providing immediate suppression to control the renewed flames. This cycling capability ensures the effectiveness of the sprinkler system while maintaining safety and minimizing operational costs.

In contrast, the other options do not describe this specific function. The alert feature typically involves notifications of fire or system status but does not control water flow. The monitoring feature involves keeping track of system performance and detecting abnormalities. The throttle feature, while related to regulating flow, does not specifically address the automatic shut-off and reactivation aspects of the system associated with fire conditions. Therefore, the recycling feature accurately encapsulates the described functionality within a fire suppression context.