Which system creates an appetite for the things that keep you alive, such as good food and the company of other human beings?

The system is called the lymbic system. It is associated in a part of the brain where it is responsible in stimulating the person's thought or emotions. It is also concerned with the person's feeling of thirst and hunger which is related to the given statement above. Others, where it is also concerned, are such like sex or the needs of having a company.