Which of the following means "for a time"?

The phrase "pro tem," short for "pro tempore," translates to "for the time being" or "for a time." This term is often used in legal or formal contexts to denote a temporary status or arrangement. For example, a person may hold a position pro tem, implying they are serving temporarily until a more permanent solution is put in place.

Understanding this term is key for recognizing how it is applied in different contexts, especially in legal or academic settings where temporary assignments or roles are common. The other options, while each meaningful in their respective domains, pertain to different concepts: "pro bono" refers to work undertaken for the public good without charge, "post mortem" relates to events that occur after death, and "prima facie" pertains to something that is accepted at first glance as sufficient or adequate until disproved. This distinction highlights why "pro tem" specifically addresses the notion of temporariness.