FFM stands for Five Factor Model, which is widely used in psychology to describe human personality.
It outlines five broad dimensions: Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism.
This model is also known as the Big Five Personality Traits.
Options (A), (B), and (C) are not recognized psychological models for personality assessment.
Therefore, the correct answer is option (D).