Humanistic psychology focused on individual's potential and stresses out the importance of self-actualization and growth. Its belief is that people are innately good and social and mental problems are results of deviations from natural tendencies. I believe that the statement above is enough to say that humanistic psychology presents an optimistic view of people who are part of the world.
Explanation: The way the word expenditure as used in this concept is a noun refering to the application of energy as a result of bodily movement. It also talkes about the use of energy