A humanistic theory of personality is based upon self-actualization, a concept related to personal growth, acceptance of self and others, etc.
The humanistic theory, no matter in which area it is applied, tends to focus more on a person's positive qualities and ability for constant growth. We can say the humanistic theory is based upon the concept of self-actualization.
The term self-actualization, developed by Maslow but attributed originally to Goldstein, refers to our ability to grow personally. Self-actualized people accept themselves and others the way they are. They live more fulfilling lives, doing things for the mere enjoyment it provides.
With the information above in mind, we can conclude that the answer provided above is correct.
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