Read this passage from President Reagan’s speech to Holocaust survivors to identify an appeal.

We must see to it that the immeasurable pain of the Holocaust is not dehumanized, that it is not examined clinically and dispassionately, that its significance is not lost on this generation or any future generation. Though it is now a dry scar, we cannot let the bleeding wound be forgotten. Only when it is personalized will it be real enough to play a role in the decisions we make. Those victims who cannot be with us today do a vital service to mankind by being remembered. But we must be their vessel of remembrance. This reunion is part of our duty to them.

–Speech to Holocaust survivors, Ronald Reagan

Which type of appeal does Reagan use in this passage?

Which pair of words or phrases from the passage best indicates the type of appeal used?