Define the term "fuse."

A fuse is a safety device designed to protect electrical circuits by interrupting the flow of current in the event of an overload or short circuit. When the current exceeds a certain level, the fuse element melts, creating an open circuit that stops the flow of electricity. This prevents potential hazards such as overheating, fires, and damage to equipment. The primary purpose of a fuse is to safeguard both the electrical system and the devices connected to it by providing a way to disconnect power automatically when dangerous conditions arise. This characteristic of interrupting current flow under fault conditions is what makes it an essential component in electrical safety systems. The other choices, while related to various electrical functions, do not align with the specific role that a fuse plays in circuit protection.