Who is King Laius in relation to Oedipus?

King Laius is Oedipus's biological father, making this the correct answer. The tragic narrative of "Oedipus Rex" revolves around the fate of Oedipus, who, without realizing it, fulfills a prophecy that he will kill his father and marry his mother. This prophecy leads to a series of events that not only highlight the themes of fate and free will but also underscore the complexities of familial relationships in the story. Laius, as the king of Thebes, represents the paternal figure that Oedipus is destined to confront, which ultimately leads to the tragic unfolding of the plot. Understanding this relationship is crucial for grasping the central conflicts and themes of the play.