After returning to South Africa from Algeria in 1964, Nelson Mandela was O arrested and imprisoned.
O elected to the presidency.
O educated in guerrilla tactics.
O finally granted his freedom.

Sublimation

Explanation:

It isn't condensation because the molecules are spreading apart and condensation isn't air molecules becoming freer.

It isn't evaporation because evaporation goes from liquid state.

It isn't deposition because it is the laying down of sediment

And it IS sublimation because sublimation passes through the liquid state so it is directly from solid to gas as shown in the image