Final answer:
The nurse is promoting the third level of Maslow's hierarchy of needs known as 'Love and Belonging' by encouraging family visits for a patient isolated due to MRSA, acknowledging the importance of social support for the patient's well-being.
Step-by-step explanation:
When the nurse encourages family visits for a patient in isolation due to possible methicillin-resistant Staphylococcus aureus (MRSA), the nurse is promoting the third level of Maslow's hierarchy of needs. This level is known as the 'Love and Belonging' stage, where emotional support and a sense of community are emphasized as crucial for a patient's well-being. By facilitating family visits, the nurse is recognizing the importance of social interactions, which help fulfill the patient's psychological needs for companionship and support during the isolation process, thus promoting quicker recovery and emotional stability.