Answer:
family studies
Step-by-step explanation:
The family is the first environment of socialization of the individual subject, and by several factors this becomes a distinct social group from the others. Thus, a family study is the type of study that proposes a scientific investigation and systematization of the knowledge of intrafamily social relations. This study is most likely within sociology to compare unrelated siblings living in the same house.
The family as a living group commonly changes in several aspects over time. Likewise, their role in the life of each of its members changes according to their physical, psychological and intellectual development. Thus a family study finds a wide field for its observations, as it faces so many variables.