which of the following is the correct term used to describe a group of body parts working together to perform a specific function

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)

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Ibelieve the correct answer is  stratum  lucidum.

Answer listing the cosequences of the options;