Why are solids described as rigid in nature?

The correct answer is: Their particles are closely packed with strong attraction

Explanation:

Solids have a definite shape and volume, which makes them rigid in nature. This rigidity is due to the microscopic arrangement of constituent particles (atoms, molecules, or ions) in a solid:

1. Interparticle Distance: The particles in a solid are very closely packed together, leaving very little space between them.

2. Intermolecular Forces: The forces of attraction between neighboring particles are extremely strong. These strong intermolecular forces hold the particles fixed in their specific positions.

3. Fixed Positions: Because of the strong attractive forces and close packing, the particles cannot slide past one another or move freely; they can only vibrate about their fixed mean positions.

Therefore, when an external force is applied, solids maintain their shape and resist deformation, making them rigid in nature.