Answer:
Transistors
Transistors. The onset of the Information Age can be associated with the development of transistor technology. The concept of a field-effect transistor was first theorized by Julius Edgar Lilienfeld in 1925.
Henry David Thoreau is best known for "Walden", a book written when he was living for 2 years in a little cottage in a deep forest, and it's about living in nautre. Thoreau also wrote "Resistance to Civil Government" which is about why people shouldn't obey an unfair law. Those two books had a great impact for many later reformers.
What helped Greece in trade is its access to the sea and its trade roots too.
I think 5 but might want to make sure
