How is it "lui" here? Please help

Question

Qu'est-ce qui est arrivé à Elsa ? - Tom ________a volé ses bonbons !The correct answer is LUI, I marked La

Tom has stolen "her" chocolates (la)Tom has stolen "to her" chocolates (LUI)

Please help me

Accepted Answer

It is voler quelque chose à quelqu'un. In the example you cite, ses bonbons is the direct object and lui (replacing à Elsa) is the indirect object.
You can't translate à as "to". There is no one-to-one correspondence of the French à to a single English preposition.

Answer

Thank you so much!after your reply I was able to make sense of it, I also found more herehttps://www.wordreference.com/fren/voler