And for that crime, Romeo is immediately banished from Verona.
You can replace the word banished with exiled or any other synonym to those words.
Hope this helps!
The meaning of Gwendolen's words is that she is against the traditional idea that women are the ones who should stay at home to be in charge of the domestic duties. She shows that women might have a position of power and that men can stay at home.
The literary technique used is Paradox because Gwendolen proposes a reversal of the traditional and well-known ideas.
The author's choice to tell the story from the children's perspectives is effective. The children do not have the same prejudices and concerns that the adults have. As a result, they are open to one another and become friends despite their differences. They provide the reader with unbiased insight into what is happening on the mainland and on Malaga Island.