Question

density (noun) den·si·ty den(t)-sə-tē \density measures how heavy something is for its size.\ read the quote. what is the meaning of density as it is used in this context? a the volume of a substance per unit of length b the volume of a substance per unit of mass c the mass of a substance per unit of volume

Explanation:

The quote states density measures "how heavy something is for its size." "Heavy" refers to mass, and "size" refers to volume. Thus, density is mass per unit volume.

Answer:

C. the mass of a substance per unit of volume