Final answer:
Men and women have different communication styles and body language.
Step-by-step explanation:
The observation made by Herve, that when a man nods it most often indicates agreement, and when a woman nods it most often indicates listening, aligns with the observation of sociologists that men and women have different communication styles. Deborah Tannen, a researcher, argues that men engage in conversation to assert their status, while women are more interested in building solidarity. Additionally, nonverbal communication, including body language, varies across cultures, indicating that men and women have different body language as well.