what is conserved in physical changes? shape energy mass density

Brief Explanations:

In physical changes, the amount of matter remains the same. Mass is a measure of the amount of matter. According to the law of conservation of mass, mass is conserved in physical changes. Shape can change (e.g., molding clay), energy can be transferred or transformed in different forms during physical changes like melting (heat energy change), and density can change if the volume changes while mass remains constant (e.g., ice - water phase change).

Answer:

C. mass