Answer:
Family.
Step-by-step explanation:
This is the basic definition of family. The function of family is to maintain a wellbeing of an individual as well as the society as a whole. Families offer predictability, structure and sense of security. The most widespread form of family is conjugal or nuclear family. What distinguishes them from other types of families is that it must include both husband and a wife, with or without children. Other forms of family can be single-parent family, matrifocal family, poligamous family, etc.