I think this question showed up here twice on Brainly. I'll refer you to the answer I gave at the other location:
Read more on Brainly.com - https://brainly.com/question/8964005#readmore
Basically, the concept the question is referencing is the principle of reciprocity. The principle of reciprocity says that human beings have a need and tendency to want to give something back when something is received. This give and take approach helps us to work together toward compromises and mutually agreeable solutions.
