Final answer:
Teresa Carleo, gregarious and assertive, is best described by the personality trait of extraversion, which aligns with her sociability and assertiveness.
Step-by-step explanation:
The question is asking which of the following personality traits from the Five Factor Model (also known as the Big Five) best describes Teresa Carleo, the founder of Plant Fantasies in New York, who is characterized as gregarious and assertive. Based on these descriptions, she can be best described as extraverted.
Extraversion is one of the Big Five personality traits and is characterized by sociability, assertiveness, excitement-seeking, and emotional expression. Individuals with a high degree of extraversion are typically outgoing, energetic, and enjoy being around other people. Teresa Carleo's gregarious nature (enjoying the company of others) and her assertiveness (confidently expressing her thoughts and feelings) align closely with the characteristics of extraversion.
The other options, 'openness to experience' and 'agreeableness', do not specifically match the qualities of being gregarious and assertive. 'Openness to experience' involves traits like curiosity and a broad range of interests, whereas 'agreeableness' relates to being cooperative and compassionate. While these traits could be present in Teresa Carleo's personality, they are not implied in the descriptors provided in the question. Therefore, extraversion is the clear choice for describing her personality based on the information given.