Atoms that cannot move past one another become free to move will takes place in the process of vaporization and sublimation. option A is correct.
What are vaporization and sublimation?
vaporization is a state of matter into which the water or any liquid changes its state from liquid to gas because of the energy in the form of heat which is provided due to the energy provision their bonds will break and In both the process we provide energy to atoms because of this they are allowed to be  free to move.
The best example of it is the vaporization of water changes its state to gas in the form of clouds
Sublimation is a process in which there will be a direct conversion of solid into the gas phase there will be no liquid state in between. Sublimation is the endothermic phase transmission of energy
In both the process we provide energy to atoms because of this they are allowed to be free to move
Therefore, due to the direct changing of states option A is correct.
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