Temperature
Density
Mass
Volume
Answer is Right!
Answer is Wrong!
The correct answer is A. Temperature.
Heat is a form of energy that is transferred from one object to another due to a difference in temperature. The hotter object will transfer heat to the colder object until they reach the same temperature.
Density is the mass of an object per unit volume. Mass is the amount of matter in an object. Volume is the amount of space that an object takes up.
Heat does not flow as a result of difference of density, mass, or volume.