It is a complex preposition.
The correct answer for the question that is being presented above is this one: " b. Whenever it gets too cold outside, my husband worries about the pipes freezing. Based on the choices above, it is the choice on letter b that contains an explanation. It explains why the husband worries about the pipes freezing.
Answer:
-a slide show
Explanation:
PowerPoint is mainly used as a slide show creation software.