Explain why a copper wire can not be used as a fuse wire?

Hi,

A fuse is a thin wire made of a material which have low melting point so that it melts and breaks off the circuit if the current exceeds the safety limit. A copper wire cannot be used as a fuse wire because it has a high melting point. It will not melt easily when a high electric current passes through it and may damage the electrical appliances.

Hope this helps,

Good luck.