Final answer:
Victor's reference to Mount Montanvert is an example of literary allusion.
Step-by-step explanation:
Victor's reference to Mount Montanvert "I stood beside the sources of the Arceiron" is an example of literary allusion. This is when a work of literature makes a reference to another work or idea, which the readers can easily recognize. In this case, Victor is referring to the sources of the Arceiron, which is a fictional location in the literature.