Final answer:
Bill Cosby's lesson to his son relates to the impact of social class and inequalities in society.
Step-by-step explanation:
In Bill Cosby's teaching to his son, he unconsciously displayed deference toward the wealthy and well-born, which was a lesson he learned from his own interaction with a poor man. This implies a broader lesson within the context of social studies, which is the study of human society and social relationships. It highlights the impact of social class and the inequalities that exist in society.