Sociologist catherine ross has suggested that we need to reconceptualize various living arrangements as a continuum of

I believe the answer is: social attachment
social attachment refers to the theory that view in order for a child to develop proper social skills, that child need to at least develop one relationship with a primary caregiver.
This happens because most social skills that acquired by the children. happened due the process of observation and mimicry of other people around them.

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.