What device can be used to help prevent electrical shock in wet environments?

The Ground Fault Circuit Interrupter (GFCI) is specifically designed to protect people from electrical shock in wet environments, such as bathrooms, kitchens, and outdoor settings. It functions by continuously monitoring the current flowing through a circuit. If an imbalance in the electrical current is detected— which may indicate that electricity is escaping to a grounded surface, potentially through a person—it immediately disconnects the power to prevent electric shock. This makes it essential for safety in areas where moisture is present.

In contrast, the other devices listed do not serve this safety purpose. A heat detector focuses on detecting heat and smoke to alert individuals of a fire, while a smoke alarm detects smoke particles in the air to signal fire hazards. A voltage regulator is used to maintain a consistent voltage level and does not provide any protection against electrical shock. Thus, the GFCI stands out as the only device tailored for preventing electrical shock in environments where water is a factor.