Which part of the face was highlighted in the example provided in chapter 4?

The correct choice emphasizes the lips as a significant feature highlighted in the example from chapter 4. The focus on the lips in the chapter likely serves to illustrate their expressive nature and importance in communication and interpersonal interactions. Analyzing the lips can also be relevant in discussions about facial expressions, beauty standards, or even in the context of certain societal norms and cultural differences regarding appearance. Understanding the role of the lips can contribute to a deeper appreciation of how facial features interact to convey emotional and social messages.