I think its C. preparation.
Answer:
An endocrinologist will have expertise in treating diabetes, thyroid disorders, metabolic diseases, and other conditions related to the endocrine system. All doctors complete a training program called a residency after they finish medical school.
Explanation:
The body's primary source of energy is the nutrients from food and also water but mostly food <span />
Explanation:
in chemical reaction we find out that it is full of chemical
so please mark me as brainlist
