Final answer:
Extraversion is a core personality dimension characterized by sociability, assertiveness, and excitement-seeking, and is distinct from agreeableness, conscientiousness, openness to experience, and neuroticism.
Step-by-step explanation:
The facet of the core personality dimensions of extraversion is sociability, assertiveness, excitement-seeking, and emotional expression. Of the options provided, extraversion specifically refers to being socially energetic versus having a preference for quiet or alone time. The other personality dimensions listed - agreeableness, conscientiousness, openness to experience, and neuroticism - are separate facets of the Five Factor Model or the Big Five, which represent different aspects of a person's core personality dimensions.