On the second day of hospitalization a client is discussing with the nurse concerns about unhealthy family relationships. during the nurse–client interaction the client begins to talk about a job problem. the nurse's response is, "let's go back to what we were just talking about." what therapeutic communication technique did the nurse use?

The therapeutic communication technique which the nurse used is FOCUSING. 
Focusing is a therapeutic communication technique, which health providers use to facilitate the client's ability to focus on and pay attention to the matter at hand which is of the highest priority at that moment. This technique helps nurses to establish trust with their patients.

It's either -limiting factors or -scarce resources but i'd go with my first answer since the food and water are abundant they really aren't scarce

Air enters through the nose (and sometimes the mouth), moves through the nasal cavity, the  pharynx, the  larynx, enters the  trachea, moves through the  bronchi  andbronchioles  till the alveoli.