The picture on the right shows an exploding firework high up in the air,just after the firework has come to a rest.Which point best describe the center of mass of the explosion? 
Picture by H.K.Ng
Definitions:
Stress
A condition of emotional, mental, or physical strain or tension resulting from adverse or demanding circumstances.
Immune System
The complex network of cells, tissues, and organs that work together to defend the body against attacks by foreign invaders, such as bacteria, viruses, and parasites.
Illness
A condition that negatively affects a person's health, interrupting or modifying their bodily functions.
Anomie
A state or condition of society or an individual marked by a breakdown of social norms and values, often leading to social instability.
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