Openness (a) involves being inventive, eager to face new challenges, and inquisitive (iii).
Extroversion (b) is marked by being energetic, optimistic, and sociable (i).
Neuroticism (c) is associated with feelings of insecurity, nervousness, and anxiety (ii).
Agreeableness (d) is characterized by being friendly, cooperative, and reliable (iv).
These personality traits are accurately linked with the descriptors that outline the individual differences in emotional and behavioral responses.