What indicates that a griddle's heating element is functioning?

The indicator light turning on is a sign that the griddle’s heating element is functioning properly. When the heating element receives power and is generating heat, the indicator light provides a visual cue to the user that the griddle is operational and at work. This feature is crucial for ensuring that food can be cooked effectively.

Having an indicator light helps prevent accidents as it allows the operator to immediately know the state of the heating element before starting to cook. This enhances both safety and cooking efficiency in the kitchen.

Other options, while they may indicate functionality in different contexts or equipment, are not specifically relevant to the operation of the griddle’s heating element. The probe and display might relate to other functionalities that do not directly confirm heat production, and a sound alert is not a standard feature for indicating a heating element's operation in griddles.