Which of the following can be classified as an extensive property?

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An extensive property is one in which a physical quantity (amount) is impacted by the size of the system it describes or by the amount of matter within that system. One example of an extensive property is entropy. Since entropy can be defined as the amount of "randomness" or "disorder" in a system, it is directly impacted by both the size of the system and the amount of matter within it.
Malleability is a substance's ability to deform under pressure (compressive stress). If malleable, a material may be flattened into thin sheets by hammering or rolling. A substance's ability to change form under pressure is not dependent on the size of the system or the amount of matter within it.
The melting point of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure, not on the size of the system or the amount of matter within it.
Lustre or luster is the way light interacts with the surface of a crystal, rock, or mineral. There are two main types of luster: metallic and nonmetallic. This quality of a substance is not affected by the size of a system or the amount of matter within it.

Which of the Following Can Be Classified as an Extensive