Certain key words that signal a reason is being offered in support of a conclusion or that a conclusion is being asserted are known as words.

Cue

Explanation:

Cue is a thing said or done that serves as a signal to an actor or other performer

So, Certain key words that signal a reason is being offered in support of a conclusion or that a conclusion is being asserted are known as Cue.

Cue

Explanation:

A statement that has been said or done which acts as a signal or sign for a participant or any other performer to join or continue their speaking or performance.

Some of these words include: incidentally, have, for example, by the way, first, second, then, hence respectively, finally, in description, and on the other hand.