What electrical device can be used to protect against overheating?

The correct choice, circuit breakers, serve an essential role in electrical safety primarily by protecting against overheating. They function by interrupting the flow of electricity when they detect an overload or short circuit in the electrical system. When too much current flows through the wires, it can generate excessive heat, leading to potential damage or fires. Circuit breakers automatically switch off the electrical circuit to prevent overheating, thereby safeguarding both the electrical system and the surrounding environment.

In contrast, a voltage regulator maintains a steady voltage level within a specific range to protect devices from voltage fluctuations, but it does not specifically prevent overheating resulting from overloads. A Ground Fault Interrupter (GFI) primarily protects against electrical shock by shutting off power when it detects an imbalance in electrical current but does not address the overheating issue directly. Transformers are used to change voltage levels and manage power distribution but do not inherently provide protection against overheating.