uncertainty
The ghost of Hamlet’s father haunts him as do the ghosts of Europe that haunt Valery’s writing. It is safe to surmise that ghosts are a symbol of _uncertainty____. anxiety corruption uncertainty surety
Sentence 3 supports the main idea of the passage the least because it doesn’t even mention anything about the women in their family, it definitely talks about women and their active ness in politics, but it doesn’t have anything to do with the women in their family whereas all the other sentences do.
Hope this helps!
A summary is a breif explanation/sum up of what you have talked about or what ever the topic was. It is used to wrap up everything you have explained. It is better to use summary's so that we can say the main idea in less words and so people can read it quicker and get the idea of that topic.