Answer:
neuroticism and extraversion
Explanation:
The idea of the five-factor model is that people's personalities are based on the scales of the following traits:
Out of these, however, most important for behavioral differences are extraversion and neuroticism.
Extraversion is the one that shows how much are people outgoing and interactive with others. Extroverts usually tend to be more easy-going and outspoken, while introverts are shyer and more drawn back.
When it comes to neuroticism, it is a scale that usually shows how prone the person is to anxieties or depressions - if they worry too much or if they are usually more stable and calm in general.