Answer: (1) Live wire
A fuse wire is made of an alloy of lead and tin. If the current in a circuit exceeds the current rating of the fuse wire it melts. Higher the current rating, thicker is the fuse wire.
In live wire, fuse wire is inserted since it is a safety device used to secure electrical equipment against short-circuit as well as overloading. The current flows mostly in live wire, and the fuse connected in live wire splits and the circuit opens and thus protects electrical equipment when current reaches its normal limit.