The metaphor implied in lines 29-31 ("And up...identity") is best interpreted as assigning the endless altered people" the qualities of a A
map guiding travelers to a destination
B
group of soldiers preparing for battle
с
recurring wave eroding a shoreline
D
cemetery that has many empty tombs
E
deep well that provides fresh water

The main themes of the play are: fate and free will with the inevitability of oracular predictions is a theme that often occurs in greek tragedies the conflict between the individual and the state similar to that in sophocles’ “antigone” and   people’s willingness to ignore painful truths both oedipus and jocasta clutch at unlikely details in order to avoiding facing up to the inceasingly apparent truth and sight and blindness the irony that the blind seer tiresius can actually “see” more clearly than the supposedly clear-eyed oedipus, who is in reality blind to the truth about his origins and his inadvertent crimes.

C.because of physics now you just gotta remember physics.