The correct answer is Cursing and profanity can have a profound effect on someone.
Momaday does not make mention of concepts such as curses or profanity. He rather believes language is a powerful tool in the sense that words can inspire emotions and shape reality, and is important to preserve in order to understand ourselves as human beings. Momaday also believes that man's idea of himself exist in language, and in language alone - which is a re-phrasing of the first option presented on the list.
