Final answer:
The French pronoun used to replace the underlined subjects is 'ils'.
Step-by-step explanation:
The French pronoun used to replace the underlined subjects in the given sentences would be ils which is the plural form of the pronoun il (he).
- Valérie and Amélie are blowing up balloons. -> Ils
- Baptiste is choosing which CDs to play. -> Il
- Amandine, Tristan, and Denis are putting out the snacks. -> Ils
- Charlotte is filling glasses with ice. -> Elle
- Florian and Adrien are hanging the decorations. -> Ils
- You and your cousin are setting up chairs. -> Vous
- My brother and I are watching out the window for Guy. -> Nous
Using the appropriate pronouns helps maintain clarity and conciseness in the sentences.
Learn more about French pronouns