In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
A trace or remnant of something that is disappearing or no longer exists.

* Vestige means a trace of something that is disappearing or no longer exists.
Memento refers to an object kept as a reminder or souvenir of a person or event.

Variable means something that is element, feature, or factor that is liable to vary or change.

Glimmer means a faint or wavering light, or a faint sign of a feeling or quality.