Answer:
The second principle of training is "Intensity." Intensity is basically the level of difficulty an exercise is. The balance one needs to find during a workout is important to burn energy and prevent any injury. One way an individual can find a good balance is by determining their heart rate. It is important to stay inside that zone.
Gender
Skin pigmentation
Religiously
Preference of opposite sex
Mental challenges
Physical challenges
Weight
Age
Hope these helped. :)
The answer is A. Anyways Brainly said my response wasn’t long enough so ignore this part. :)