Final answer:
The nurse's actions in assessing and correctly adjusting an IV line that was not infusing at the ordered rate exemplify problem solving, as the nurse systematically identifies and rectifies the infusion issue.
Step-by-step explanation:
When the nurse observes that the patient's intravenous (IV) line is not infusing at the ordered rate and takes a series of steps to assess and rectify the situation, this is an example of problem solving. The nurse not only identifies there is a problem but systematically examines various potential causes before adjusting the flow rate, thereby solving the issue. This reflects the practical application of knowledge and skills to address a challenge and achieve a desired outcome.