Final answer:
b) Postmodernism is the term that describes questioning the core of psychological science and challenging its approach to truth and focus on the individual.
Step-by-step explanation:
The term that describes questioning the core of psychological science and challenging its approach to truth and focus on the individual is b) Postmodernism.
Postmodernism is a philosophical and theoretical perspective that emerged in the late 20th century and rejects the idea of absolute truth and the belief in universal explanations. Instead, it emphasizes the diversity of human experiences and the importance of social and cultural contexts in understanding psychological phenomena.