Final answer:
Psychologically healthy individuals as identified by Maslow display characteristics such as high self-esteem and a well-developed sense of self, which includes a range of positive traits. Of the options provided, a well-developed self-concept encapsulates these qualities. So, the correct answer is option d.
Step-by-step explanation:
Abraham Maslow identifies psychologically healthy individuals as those who have achieved or are in the process of achieving self-actualization. This is the highest level on his hierarchy of needs and represents the fulfillment of one's full potential.
As part of this process, Maslow noted that these individuals often possess characteristics such as high self-esteem, self-acceptance, authenticity, and a well-developed sense of self, which includes being open, creative, loving, spontaneous, compassionate, and concerned for others. In the context of the provided options, the one that is characteristic of psychologically healthy individuals as identified by Maslow would be a well-developed self-concept.
So, the correct answer is option d.