What is a wire?

A wire is defined as a single slender rod or filament made of metal that is typically drawn to be thin. This definition captures the essence of what a wire fundamentally is, focusing on its shape and the material used. Wires are commonly used to conduct electricity, but their primary characteristic is their form as a thin, elongated piece of metal. This form allows them to be highly versatile for various applications, including electrical wiring and structural purposes.

While wires are often associated with electrical applications, the broader definition emphasizes the physical attributes of being slender and made of metal, which distinguishes them from other related items, such as cables or thicker metal pieces. Thus, defining a wire as a slender rod effectively encapsulates its characteristics and intended use, making it the most accurate choice among the options presented.