Human compassion allow us to see things from other people's perspective although some might call that empathy. We've based a lot of what we are and what we do as people on compassion towards others. Some might say that our system of morality is based on reducing suffering, something compassion makes us do.
The correct answer is the Nervous system and the Endocrine system. These two systems control all other systems and by doing it create homeostasis in the body.