Un élément nutritif in english is: A nutrient.
The correct conjugation is B, font.
For the infinitive verb faire, the conjugations are:
Je fais
Tu fais
Il/Elle/On fait
Nous faisons
Vous faites
Ils/Elles font
Since the subject of the verb is Ils, the correct conjugation is font.
Boat hehe DONT ask me why I know what I just built different
