This is the 11928th most frequent French word.
sélectionnées
"Selected" – chosen or picked out.
Here, 'sélectionnées' is used to indicate that the books were chosen from a group by the teacher, showing its usage as a past participle agreeing with 'les livres' in gender (feminine plural) and number.
Les livres sélectionnées par le professeur sont très intéressants.
The books selected by the teacher are very interesting.
In this sentence, 'sélectionnées' describes the videos chosen specifically for the project, indicating deliberate selection and agreement with 'Certaines vidéos'.
Certaines vidéos sélectionnées pour le projet montrent des paysages magnifiques.
Some videos selected for the project depict beautiful landscapes.
Here, 'sélectionnées' refers to songs chosen by the team, demonstrating selective process and agreement matching 'Les chansons' in this context.