Answer: density will decrease.
Step-by-step explanation:
Density is defined as the mass contained per unit volume.
where ,
= Density of the object
m= Mass of object
v= volume of the object
As density is inversely proportional to volume, if volume of an object increases, the density of the object decreases when mass remains the same.
Thus the density of the object decreases if the volume of an object increases but the mass stays the same.