Answer:
you will need to look at the calories and then the ingredients and how much of each ingredients there is.
I believe the answer is: Eat a well-balanced diet to increase energy and immunity
Even though physical activities improve both our energy and immunity in the long run, they are not as significant as maintaining well balanced diet in your life.
You need to make sure that you get your nutrients from various source of non-processed food in order to fulfill both your macronutrients and micronutrients.
Osteoporosis. The prefix "osteo" means bone, "poro" means porous/with holes, and "osis" is a suffix that denotes an abnormal condition or state of being.
Likely the chronological age, mainly because it would explain the differences in puberty stages between the two boys, which is an example of physical maturation.
