Which of the following is NOT one of the main aspects of temperament outlined in your text

A)  mood
B)  activity level 
C)  emotional reactivity
D)  intellect

Temperament

An individual's innate disposition or natural predisposition to behave and react in certain consistent ways.

Emotional Reactivity

The extent to which a person reacts emotionally to events or situations, which can vary widely among individuals.

Mood

A temporary emotional state or atmosphere that can influence a person's perception and behavior.