A good scene in Island of the Blue Dolphins is when Karana was first describing the island on the third paragraph in the second chapter. You can just imagine the island they describe it so good and that is a good scene in Island of the Blue Dolphins.
She doesn't die in Island of the Blue Dolphins. She is mentioned in the sequel, Zia, in which she is taken off of the island. The sequel is about her niece, Zia, and Karana's fate is revealed. Or just read the book.