Respuesta :
Answer: d. density and volume
Explanation:
When heat is supplied to a system, the molecules absorb energy and as a result of heat , the kinetic energy of the molecules increases and thus they start moving randomly.
Thus the molecules move far from each other and thus the volume of the substance changes.
Density of an object is the mass contained per unit volume. Thus when volume changes, the density of the substance also changes.
[tex]Density=\frac{mass}{Volume}[/tex]
Thus a s volume increases, the density of the substance decreases.
