US troops kill eight insurgents during offensive in western Iraq

How does laughter impact human interactions?

• It only affects personal emotions

• It is irrelevant to social interactions

• It enhances communication and bonding

• It creates barriers between people

What is the primary focus of the introduction section?

• The physiological effects of laughter

• The cultural differences in laughter

• The history of laughter

• The concept and significance of laughter

Which type of laughter is often associated with genuine amusement?

• Nervous laughter

• Sarcastic laughter

• Joyful laughter

• Forced laughter