Why are the particles in liquid held together less firmly as compared to solids?

In liquids:

i. The force of attraction between the constituent particles is lesser.

ii. The rate of diffusion of liquids are higher than that of solids.

iii. Hence, the particles of liquid move freely.

iv. They have greater space between each other as compared to the particles in the solid state.

v. Due to large space in the liquid, their particles held together less firmly as compared to solids.