The process of a liquid changing into a solid is called

The process where a liquid state of a matter can be converted into its solid-state is called freezing.

Sublimation is the conversion from the solid to the gaseous state of matter, with no intermediate liquid stage.

Evaporation happens when a liquid state turns into a gaseous state.

Falling of moisture in the form of rainfall, snow, fog, sleet and hailstone is termed as precipitation.

Hence option D is correct answer. The process of liquid changing into a solid is called freezing.