The answer to this question is life expectancy.
Answer:
There are five traits that have a link to personality: extraversion, neuroticism, agreeableness, conscientiousness and openness.
Explanation:
Considering that personality is related to psychology, that is probably the answer.
That would be the pituitary gland
Wear protection like knee guards, helmet, arm guards etc. Stuff that would help her stay safe incase she fell. Or to stay on a wall and look for guidance.