The type of appeal used in the mentioned passage is “pathos”.
The words or phrases that indicate pathos appeal are:
“Though it is now a dry scar, we cannot let the bleeding wound be forgotten”,
“immeasurable pain”,
“Only when it is personalized will it be real enough to play a role in the decisions we make”.
Step-by-step explanation:
Pathos is a type of appeal which shows and evokes emotions in the audience or the people to whom the speech or talk is being given to.
In the presented passage given by Ronald Reagan makes a loud and clear appeal to the people to feel and empathize with the Holocaust survivors and the deceased, who suffered unimaginable pain.
This type of appeal pulls at one's heart and reaches out to them on an emotional level.