Final answer:
The Aran Islands holiday connotes a connection to Irish culture and traditions, exciting Gretta but not Gabriel due to his different outlook.
Step-by-step explanation:
The question relates to the significance of the holiday to the Aran Islands planned by Miss Ivors and why it excites Gretta but not Gabriel. The Aran Islands represent a connection to the Irish culture and heritage, which is why Gretta is excited about the trip. It signifies a return to roots and an appreciation for the simpler, more traditional aspects of Irish life. Gabriel's lack of interest may stem from his detachment from such cultural ties, possibly indicating a more modern or cosmopolitan outlook that contrasts with the traditionalism represented by the Aran Islands trip.