Answer:
relatively stable well into adulthood
Step-by-step explanation:
Temperament is an individual's character or nature which greatly affects the behavior of the individual.
Temperament develops gradually over time. During early childhood, individual differences can be seen in distress proneness, attentional orienting, positive approach, positive affect and frustration. However, temperament does appears to become more stable during the adulthood or late adulthood ages where people are in more control in their personality trait.