Directions: Choose the word that is most similar in meaning to the word in…

Concept: In a synonym question, the goal is to find the option whose dictionary meaning matches the capitalised word most closely — not merely a word that sounds similar or belongs to the same broad topic.

Application: FLEETING means lasting for only a very short time — something transient, momentary, or short-lived. Among the given options, only one option carries this same sense of short duration.

• Native means relating to the place where a person was born or a thing originates — it describes origin, not duration.

• Luxurious means comfortable, costly, or indulgent — it describes a quality of comfort or wealth, not duration.

• Cover means to place something over an object or to conceal it — it describes an action, not duration.

• Brief means lasting for a short time, which is exactly the sense carried by FLEETING.

Since Brief alone matches the 'short duration' meaning of FLEETING, it is the correct synonym.