Harvey is a very exciting person, people want to be friends with him, and find his company very desirable. Harvey usually takes the lead within his circle of friends and seldom considers what others want. Most likely, Harvey has which of the Dark Triad?

psychopathy and narcissism.

Explanation: One of several types of personality disorders. Narcissistic (personality disorder), is a personality disorder distinguish by a long-term motif of exaggerated feelings of self-conceit, deep need for immoderate attention, difficult relationships, appreciation, and a lack of sympathy for others. Treatments for narcissistic personality disorder have not been well studied. Therapy is difficult, because people with narcissistic personality disorder usually do not consider themselves to have a mental health problem.

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.

i believe your answer is mountains.