I had not heard the speech of America, smelled the grass and trees and sewage, seen its hills and water, its color and quality of light. I knew the changes only from books and newspapers.

What is the purpose of the description in this passage from Travels with Charley?

He is showing that America is a beautiful country.
He is showing that the country has changed since he has last explored it.
He is showing that he has not traveled in a long time.
He is showing that America has many unusual sights.