A person has lost something, is missing something, or feels rejected and wants to cry about it. Crying is okay. It is natural. But, in the course of growing up, children emulate parents and hide their tears. Anger comes forth when there has been a major slight, when a person's territory is assailed, and when integrity has been slighted.
Scare occurs when there is threat to body or soul.
Danger to a person triggers a reaction where breath is shortened, shoulders tighten, and care for survival occurs. If someone's essential integrity is challenged, scare also emerges. Happiness is the natural state of the organism, a kind of free breathing joy in simple living. Kids on playgrounds make joyful sounds. That is the model of happiness.