Answer: Empathy
Step-by-step explanation:
Empathy is defined as the capacity of an individual to understand and feel the emotions and feeling of other individuals.The person tends to place their own-self in the situation of other person to experience about the actual feeling of that person.
According to the situation mentioned in the question, Rosalina is using empathy method to understand the difficult state and feelings of her friend with her boyfriend through putting herself in her friend's place.In this way Rosalina can completely get to know about the issue.