Final answer:
Arete is a descendent of Erectheus, a legendary king of Athens, and she has divine ancestry through her father, Boreas, the Greek god of the north wind.
Step-by-step explanation:
Arete is a descendent of the primordial deities in Greek mythology. Specifically, her lineage can be traced back to Erectheus, as indicated in the provided text from Sophocles' play. Erectheus, a legendary king of Athens, is often considered a seminal figure in the city's mythic history. Arete also has a connection to divine ancestry through her father, Boreas, the Greek god of the north wind.