"Poor people often volunteer for over-the-counter and prescription drug tests." From a functionalist perspective this statement is describing.

 function of poverty

Explanation:

Human body is used by functionalists as an analogy to society. According to functionalists there are various functions which are taken by poors. These functions are either taken by giving high wages or may be because they don't have any other option. These works may be physically unhealthy or dirty, deed-end and underpaid.

Like in the Example poor people volunteer more for drug. It is a dangerous work. The poor people do it either they don't have any other option like someone is ill and he can't pay for medical treatment and they offer him free treatment through drug prescription test. Or may be someone need money and he is doing it. If they were rich there are less chances of doing that work so that why it is called as a function of poverty.

There are similar works which are taken from poor like waste recycling and cleaning of unhealthy places.

you aren't worthless, you are a one of a kind person who, deserves happiness like anyone else, you may not get it but everyone deserves happiness. i hope this .