Materials property under tension: The property by which a material can be drawn out into a smaller cross-section (for example, into wires) under tensile force is called:

Introduction / Context:
Different material properties describe behavior under various loadings. When a metal is drawn into wires or elongated plastically under tension, a specific property is being referenced.

Given Data / Assumptions:

• Loading is tensile, producing permanent reduction in section when desired.
• The property is concerned with the ability to undergo substantial plastic deformation before fracture.

Concept / Approach:
Ductility is the capacity of a material to deform plastically in tension, permitting drawing into wires or small sections. It is often measured by percentage elongation and reduction of area in a tensile test. By contrast, malleability relates to plastic deformation under compression (e.g., rolling into sheets).

Step-by-Step Solution:
Identify the mode: tension with reduction of cross-section.Match the property: ductility corresponds to tensile plasticity and drawability.Exclude other properties based on definitions.

Verification / Alternative check:
Common ductile materials (e.g., copper, mild steel, aluminum) can be drawn into wires; malleable materials (e.g., gold, lead) form sheets under compression.

Why Other Options Are Wrong:
Plasticity: general ability to undergo permanent deformation (tension or compression) without specifying drawability.Elasticity: ability to recover shape once load is removed; not plastic deformation.Malleability: plastic deformation in compression (rolling, hammering), not drawing in tension.Brittleness: little plastic deformation before fracture.

Common Pitfalls:
Confusing malleability (compression) with ductility (tension) because both involve plastic flow.

Final Answer:
Ductility.