Answer : The correct option is, (A) density.
Explanation :
Intensive property : It is defined as the property which does not depend upon the amount of substance. It remains same.
Extensive property : It is defined as the property which depends upon the amount of substance. Its value changes as the amount of substance changes.
From the given options, volume, length and mass are the extensive property because it depends on the amount of substance.
While the density is an intensive property because it does not depend on the amount of substance.
Hence, the correct option is, (A) density.