Which of the following words or phrases can indicate time?

The word "meanwhile" serves as an effective indicator of time because it connects two events or situations happening at the same time, or it can suggest a transition in the narrative from one timeline to another. This temporal relationship helps the reader understand the sequence of events or the simultaneity of actions occurring in a text, thereby providing clarity around timing.

In contrast, the other options do not convey a sense of time. "But" introduces a contrast or contradiction, but does not reference any timing. "For example" is used to provide clarification or illustration rather than to indicate when something occurs. "Nevertheless" serves to express an opposing thought, but again lacks a temporal aspect, focusing more on contrast than timing. This context highlights why "meanwhile" stands out as the clear choice for indicating time.