Which of the following best indicates something 'evanescent'?

The term 'evanescent' refers to something that is fleeting, temporary, or quickly fading from sight or existence. It captures the idea of transience and suggests that the entity in question is not meant to last for a long time. Choosing the option that indicates 'quickly fading or disappearing' aligns perfectly with the fundamental meaning of 'evanescent,' as it encompasses both the rapidity and the temporary nature inherent in the word.

In contrast, the other options convey meanings that are diametrically opposed to the idea of evanescence. The first choice suggests a quality of persistence and lasting duration, which counters the essence of something that is evanescent. Similarly, the final option implies a state of being sustained and enduring, which again contradicts the fleeting nature implied by 'evanescent.' The second choice introduces concepts of shifting and instability, which may suggest change but do not necessarily align with the specific notion of quick disappearance. Therefore, the selection of 'quickly fading or disappearing' encapsulates the core essence of 'evanescent' most accurately.