He is most likely studying for pharmacotherapy since it is the study of medical treatment by means of drugs.
Pharmacokinetics studies hows the drugs move throughout the body. Both pharmacogenetics and pharacogenomics include the study of a person's genes.
I believe the answer is D, because the other options are normal things that happen during stages of weight loss or puberty.
Hope this helps! :)
The class of nutrient that is necessary for production is D. FAT
Jessica ash
It has a nice sound
