Moral relativism is the view that moral judgments are true or false only relative to some particular standpoint (for instance, that of a culture or a historical period) and that no standpoint is uniquely privileged over all others. It has often been associated with other claims about morality: notably, the thesis that different cultures often exhibit radically different moral values; the denial that there are universal moral values shared by every human society; and the insistence that we should refrain from passing moral judgments on beliefs and practices characteristic of cultures other than our own.
The main responsibility of the endocrine system is to regulate the body's growth and development, so I think your answer would be "create growth spurts in teen boys" Hope this helps!