Final answer:
When substances are dissolved in something other than water, the measurements of density change, specifically the volume is not measured the same way.
Step-by-step explanation:
Density is a property of a substance that is determined by its mass and volume. When substances are dissolved in something other than water, the measurements of density change. Therefore, the correct answer is (b) Density; volume as the volume of a substance is not measured the same way when dissolved in something other than water