The term that best fits the description given above is SPECIFICITY. Specificity formally refers to targeting training needs. These includes activities, workouts and exercises to be covered that aim to acquire the specific needs for the training. The answer is the second option.
The answer is:
Age
This is because if your young your organs are not as developed. When your older your body handles more because it is developed fully.
Well, maybe they can be. In order to keep he/she safe.
Leave no trace would be the answer
D Type. He is changing the type of activity he is doing for his bike-riding routine.
