Which of the following is/are physical property(ies) of matter?

The correct answer is option 4. All of these.

All three properties mentioned—rigidity, fluidity, and density—are physical properties of matter.

1. Rigidity:

Rigidity refers to the resistance of a material to deformation or bending. It is a physical property that describes how a substance maintains its shape when subjected to external forces.

2. Fluidity:

Fluidity is the ability of a substance to flow and take the shape of its container. It is a physical property associated with liquids and gases.

3. Density:

Density is a measure of how much mass is contained in a given volume. It is a physical property that helps characterize and identify different substances.

These properties describe the state, behavior, and composition of matter without involving any chemical changes.