The question asks for the meaning of "Talak-e-tafwiz" under Muslim personal law. Let's look at what each option describes and match it to the actual concept.
Since "tafwiz" specifically denotes the act of delegating authority, and Talak-e-tafwiz is precisely the mechanism where the husband hands over his power to pronounce divorce to someone else.
Therefore, the correct answer is Talak by delegation.