You can usually recognize when a person is happy just by looking at this pressure on their face this is because happiness is a learned emotion be a defense mechanism see a coping strategy be a Primary Emotion

Answer 1

Happiness is generally considered a primary emotion. Primary emotions are basic emotions that are universally recognized and experienced, such as happiness, sadness, anger, fear, surprise, and disgust. They are typically instinctual and can be identified through facial expressions and body language. While they can be influenced by cultural and social factors, the ability to recognize happiness by looking at someone's face is largely rooted in our innate understanding of these emotions.