What makes up a nuclear biological family?
A typical nuclear family is made up of a biological father, mother and child or children.
A frequent variation of the nuclear family is a matrifocal family which consists of a biological mother and child or children or a patrifocal family which consists of a biological father and child or children.
These martifocal and patrifocal families are still considered nuclear familes.
Under normal circumstances, the preservation of the biological nuclear family is always in the best interest of everyone in the nuclear family. There are times, however, when because of circumstances, a child’s interests may be best serviced by the re-establishment of a new adoptive nuclear family.