The answer is: <span>makes people feel calmer and less nervous, since they feel more relaxed in the presence of their partner.
People tend to see their partner as someone that will always on their side and will back them up whenever they're facing a threat.
This means that by the existence of our partner alone, we will obtain some sense of security in every situation</span>
I believe the answer is: Case study
Case study refers to a form of research that includes in-depth and detailed examination toward a certain subject study as its method of collecting data. Case study is the type of research that's the most popular by researchers in formal work background/ settings.