All of those are a part of Great Britain
If eligible to register with the selective service system and not taking the offer you will not be able to do more than a few things and a fine could be in place. Because of this, I would consider this a duty.
What are the answer choices my friend
Thoureau wanted to poit to the fact that following traditions limits us and deprives us from developing our imgination. Thoreau, like other romantic authors, does not agree with tradition. He thinks it prevents people from finding true greatness and blocks their path to spirituality. "Castles in the air" are simply illusions by which people persuade themselves in something that is not true, in Thoureau's opinion.