The psychology that stresses the relationship between the individual and the cosmos (universe) and in doing so focuses on the mystical and spiritual aspects of human nature is called:

Correct option is A

Transpersonal psychology focuses on the spiritual and transcendent aspects of human experience, exploring the relationship between the individual and the cosmos, including mystical experiences, higher consciousness, and spiritual development.

Information Booster:
• Transpersonal psychology is often called the "Fourth Force" in psychology, emerging after behaviorism, psychoanalysis, and humanistic psychology
• It integrates spiritual and transcendent aspects of human experience with psychological theory and practice
• Key areas include meditation, peak experiences, spiritual emergence, consciousness studies, and self-transcendence
• Founders include Abraham Maslow, Stanislav Grof, and Ken Wilber
• The field examines altered states of consciousness, mystical experiences, and human potential beyond ego boundaries
• Transpersonal psychology bridges Eastern spiritual traditions with Western psychological science

Additional Knowledge:
• (B) Existential psychology: Focuses on human existence, freedom, choice, and meaning, but emphasizes personal responsibility rather than cosmic/mystical connections
• (C) Psychoanalytical psychology: Emphasizes unconscious drives, early childhood experiences, and psychosexual development—not spiritual or cosmic aspects
• (D) Behavioural psychology: Focuses on observable behavior and environmental influences, explicitly avoiding internal/spiritual experiences