<em>Bonjour,</em>
Elle est qui, cette personne ? INCORRECT
Correct is : <em>Qui est cette personne ?</em>
Or : <em>C'est qui cette personne ?</em>
The translation?:
the fascination that one can have for something that has does it benefit?
Are you taking a course with a teacher? You could message that teacher and ask for a solution. I hope you can get it working again! Bonne chance!