Which element of the story most clearly shows Pi's respect for boundaries?

The suffering and the emotional cost of the Holocaust must be remembered.

Explanation:

In the given passage from Ronald Reagan's "Speech to Holocaust Survivors", he expressed the importance of remembering the "immeasurable pain of the Holocaust". He stressed that "its significance is not lost on this generation or any future generation".

Despite the event long gone in the past, "now a dry scar" on the minds and memories of people, it must not be forgotten. He also expresses his belief that "[acting as] the vessel of remembrance" of the Holocaust victims would be a "reunion" of the past and the present, the dead and the living.

Thus, the correct answer is the first option.