Sarah and her family have just moved to a new city hours away from their old home. She has made new friends who have been very supportive and helpful. Her new friend Anna is often called "Aunt Anna" by Sarah's children. In Sarah's scenario, Anna is an example of .

fictive kin                              

Explanation:

Fictive kinship: In sociology, the term "fictive kinship" is described as a way of determining social ties or forms of kinship that are not being based on affinal ties i.e, through marriage as well as consanguineal i.e, through blood ties in relation with the actual kinship ties. This term has been widely used by ethnographers and anthropologists. However, this sort of relationship displays great mutual support, enhance self-control.

In the question above, the given statement represents the fictive kin.

aristocracy, timocracy, oligarchy, democracy, theocracy and tyranny

explanation:

answer; existed; limited;