This is the 11927th most frequent French word.
sélectif
Selective.
In this sentence, 'sélectif' is used as an adjective to describe the habit of carefully choosing or being particular about something.
Mon ami est très sélectif dans le choix de ses plats au restaurant.
My friend is very selective in choosing his dishes at the restaurant.
Here, 'sélective' is used to indicate exclusivity and high entry requirements, modifying the noun 'schools'.
Les écoles prestigieuses sont souvent très sélectives.
Prestigious schools are often very selective.
In this context, 'sélectif' characterizes the ability to discern what is important or relevant from a set of information.