Describe the relationship between loss and stress.

Loss happened when we have to face the death of someone that is meaningful to use (such as friends, lover, and family)

Loss often causes emotional problem that may lead to stress.  (especially to the one that can't handle it)

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The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)