Describe what stress is and how it affects your body. address physiological fight-or-flight responses and how those responses relate to your cardiorespiratory and muscular systems.

Stress is what causes anxiety or nervousness. That being said there is good stress and bad stress. Stress can affect your body by causing lack of sleep, or restlessness. Fight-or-flight is affected by stress. The fight option increases the testosterone and dopamine levels in your body, while the Flight option decreases them.
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Why  do you think body composition focuses  on the  ratio  of  fatty tissue  to  other body tissue? why is  body composition not related  to  weight?