What is the German equivalent for "fuse"?

The correct answer is "Sicherung" because in German, "Sicherung" specifically refers to a fuse, which is a device used in electrical systems to protect circuits by breaking the connection when current exceeds a safe level. This term is commonly used in both everyday language and technical discussions regarding electrical components.

The other options have different meanings in the context of electrical terminology. "Schalter" translates to "switch," which is used to open or close an electric circuit. "Leitung" means "line," often referring to a wire or cable that conducts electricity. "Stromkreis" translates to "circuit," which is a complete path through which electric current flows. Each of these terms relates to electrical systems but serves functions distinct from that of a fuse.