Answer: Option (c) is the correct answer.
Step-by-step explanation:
When atoms lose energy, the atoms come closer to each other. That is earlier, when temperature was high then the atoms had large kinetic energy where molecules were far apart from each other. Therefore, during this stage the atoms were in gaseous state.
When the temperature was decreased, atoms came closer to each other as the kinetic energy decreases the molecules come closer to each other. This results in the contraction of molecules. As a result, during this stage the atoms were in liquid state as the atoms are still able to slide past each other.
Thus, we can conclude that the change of state is from gas to liquid is being described in this passage.