It is not punctuated correctly. It should be like this:
"I regret," said Nathan Hale,"that I have but one life to give for my country."
The quotes need to be around what Nathan Hale is saying.
"Polio" is an abbreviation for Poliomyelitis, which is a very rare disease that affects the nervous system in your body.
A - they both use first-person point of view when writing an autobiography and a memoir.
typically only the autobiography portrays the entire life of the author and a memoir tends to focus on a limited aspect of the author's life.