The correct answer is d) volume.
Volume is defined as the amount of three-dimensional space an object or substance occupies. It’s measured in units like liters, cubic meters, or gallons. Density, on the other hand, is a measure of how much mass occupies a given volume, while weight refers to the gravitational force acting on an object’s mass. Mass is a measure of the amount of matter in an object but does not directly indicate space occupied. Therefore, when referring to the space a substance occupies, volume is the appropriate term.