Final answer:
To describe one's temperament, 'constitution' is the appropriate word as it relates to an individual's mental and physical condition, affecting behavior patterns.
Step-by-step explanation:
In describing your temperament, the most appropriate word from the given options would be D. constitution. Temperament refers to inborn, genetically based personality differences. It is related to the characteristic ways of behaving and can also be associated with conscientiousness, agreeableness, neuroticism, openness, and extroversion, including the degree of introversion-extroversion. Therefore, 'constitution' best fits the context of temperament as it denotes the physical or mental condition that contributes to an individual's characteristic behavior patterns.