What is the role of fuses in electrical systems?

Fuses play a critical role in electrical systems by serving as safety devices that interrupt current flow when it exceeds safe limits. This function helps to prevent potential damage to electrical components and systems, as excessive current can lead to overheating, fires, or other hazardous situations. When an overcurrent occurs, the fuse element melts, breaking the circuit and halting the flow of electricity. This protective action helps ensure the safety and integrity of both the electrical system and connected devices.

Other choices can be dismissed as they do not accurately represent the function of fuses. Fuses do not boost voltage levels, provide energy storage, or allow voltage flow without interruption; rather, their primary purpose is to act as a safeguard against excessive current.