"Water vapor (steam) returning to a liquid state is called:" The answer options are: a. Trepidation b. Steam Collapse c. Evaporation d. Ventilation

The correct answer is not explicitly listed among your options, but the process of water vapor (steam) returning to a liquid state is commonly referred to as **condensation**. However, since none of the provided options match that term, I would suggest selecting the closest relevant option if necessary, but none of the options directly refer to condensation.