Which of the following is a change from a more condensed to a less condensed state of matter?

Boiling

Condensing

Freezing

Solidifying

By the term "condensed", this refers to the density of a state of matter. As a rule of thumb, solids are the most dense because their molecules are very close together. Next is liquids because they flow compared to solids. The least dense are gases. Therefore, a change from a more condensed state to a less condensed state is boiling (liquid to gas).