Answer:
Trust
Step-by-step explanation:
Bart is in the first stage of his life. According to Erikson he is in the trust versus mistrust stage.
In this stage if a child is given care repeatedly then the child would develop sense of trust and security in their later life. However, if the child is deceived then the child would not trust the outside world and continuously doubt others.
Bart's mother is continuously giving him care this would make him trust others later in life.