Question

flammability
thermal conductivity
延展性（ductility）
可锻性（malleability）

Explanation:

Ductility is the ability of a material to be drawn out into a wire - like shape without breaking. The image shows a wire that has been bent and coiled, demonstrating the property of ductility. Flammability is about burning, thermal conductivity is about heat transfer, and malleability is about being hammered into sheets.

Answer:

ductility