The correct answer is option 'D', which is ductility.

Ductility is the property of a material that allows it to be drawn into thin wires without breaking. This property is specifically relevant to metals, as they have a unique atomic structure that enables them to exhibit ductility.

Explanation:

1. Definition of ductility:
Ductility is the ability of a material to undergo plastic deformation without rupturing. In other words, it is the ability of a substance to be stretched into a wire or thread without breaking.

2. Importance of ductility in metals:
Ductility is a valuable property for metals because it allows them to be easily formed into various shapes and structures. It is especially important for applications such as electrical wiring and cable manufacturing, where metals need to be drawn into thin wires.

3. Atomic structure of metals:
Metals are made up of closely packed atoms arranged in a regular pattern. The layers of atoms in a metal are held together by strong metallic bonds, which allow the atoms to slide past each other when a force is applied.

4. Plastic deformation:
When a metal is subjected to a tensile force, the layers of atoms start to slide past each other. This movement of atoms allows the metal to be stretched and reshaped without breaking. This process is known as plastic deformation.

5. Ductility and metallic bonding:
The ability of metals to undergo plastic deformation is directly related to their metallic bonding. Metallic bonds are formed by the sharing of electrons between atoms, creating a "sea" of delocalized electrons that hold the metal atoms together. This type of bonding allows the atoms to move and slide past each other, giving metals their ductility.

6. Ductility testing:
Ductility of a metal can be measured using various tests, such as the tensile test. In this test, a metal specimen is subjected to an increasing tensile force until it breaks. The elongation and reduction in cross-sectional area of the specimen before rupture are measured to determine its ductility.

In conclusion, ductility is the property of a metal that allows it to be drawn into wires due to the unique atomic structure and metallic bonding present in metals. It is an essential property for many practical applications of metals, such as in electrical wiring and cable manufacturing.

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