The purpose of williams’s a key into the language of america was
to provide information about native american beliefs
to provide a dictionary of the native american language
to provide a guide for fishing with native american tools
to provide reasons to go to war with the native americans

The correct answer is "to provide a dictionary of the Native American language ". Roger Williams published his most notorious book " A Key into the Language of America" in 1643. The main purpose of this book was to provide a dictionary of familiar phrases spoken by Narragansett Indians. The book transcended to a cultural milestone of Native American culture focused on the language of this tribe.

anxious,the clues in the question suggest he was embarrassed and anxious about boo radley.