This is the best answer. In the line immediately before the proverb, the author tells us that proverbs in Mexican American communities are often used as a teaching tool, including in areas such as “regulation of peer-group relationships.” The translated proverb is an example of a proverb that relates to educating youth about peer-group relationships.

“Tone” isn’t part of the purpose, because the author never suggests that Mexican American proverbs take on a particular tone. The translated proverb is an example of a proverb that is used to educate about peer-group relations; not as an example of a particular tone. (The purpose of a proverb is not the same thing as its tone.)

Although the author mentions “traditional wisdom” as part of explaining why this proverb is used, the author doesn’t use the proverb as an example of how proverbs can appeal to traditional wisdom. The point made immediately before the proverb is introduced is that proverbs in Mexican American communities can be used to teach the youth about peer-group relationships. The translated proverb is designed to illustrate this point, not a claim about the possibility of referring to traditional wisdom.

The possibility of translating proverbs to English isn’t the purpose of the translated proverb. The point made immediately before the proverb is introduced is that proverbs in Mexican American communities can be used to teach the youth about peer-group relationships. The translated proverb is designed to illustrate this point.

The author doesn’t use the translated proverb as an example of the effectiveness of proverbs. We don’t actually know how effective these proverbs are at teaching youth. The author focuses on the purpose of proverbs, not on their effectiveness.