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.
B.) age, because even my 56 year old gym teacher can still outrun some of the healthiest girls
They have all kinds of advantages except for Breastfed infants born prematurely grow more slowly than formula fed infants .
Breastfeeding supplies immunological components that offer illness protection. Healthy gut bacterial development is supported by breastfeeding.
All the nutrients that newborns need to grow and develop are present in breast milk by nature. Antibodies found in breast milk can help keep your infant healthy. Breastfeeding can help your infant avoid health issues like allergies, eczema, ear infections, and gastrointestinal issues.
Additionally, because breast milk digests more quickly than formula, breastfed babies do need to eat more frequently than formula-fed ones. In the first few weeks, mom can find herself in demand every two to three hours (or possibly more or less).
Human milk only contains 0.5 mg/L of iron, compared to 10 to 12 mg/L in formulas fortified with cow's milk.
To know more about infants :
brainly.com/question/15521804.
#SPJ4.
To introduce elements that make up health-related physical fitness
The answer is Kinesiology
