Marisa wants to go out with her boyfriend but she has a big paper to write. according to freud, which part of her psyche will try to balance her desire to be with her boyfriend with her responsibility to do her homework

I believe the answer  is: Ego

According to Freud, Human's ego could give both positive and negative impact. The negative one is it often give a false sense of pride that make us arrogant, the positive one is that it make help us to maintain our core principles (such us choosing not to skip homework)

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.