Which transition word or phrase signals the cause in a cause and effect relationship?

finally

due to

therefore

as a result

The transition word or phrase that signals the cause in a cause and effect relationship is "due to."

To determine this, you can analyze the context of the sentence or paragraph in which the cause and effect relationship is presented. The cause is the event or action that leads to a certain result, and the effect is the outcome or consequence of that cause.

In this case, "due to" indicates that the following text will explain the cause that resulted in a specific effect. For example, "Many flights were canceled due to bad weather." In this sentence, "due to" highlights that the cause of the flight cancellations is the bad weather.