According to Sociology, a primary group is only considered a family if the group is related biologically. TRUE or FALSE

4) downward mobility

Explanation:

Social mobility is the movement of the citizens, individuals, families, or the groups through the system of the social stratification or hierarchy.

If the movement involves the loss in the social class and the economy, it is known as downward mobility.

Thus, in the given case study in which the people after the recession, lost their jobs, house and many other circumstance, shows that it was a time of downward mobility for these people.