बच्चे के विकासशील व्यक्तित्व को मुख्य रूप से निम्नलिखित में से कौन प्रभावित करता है?

According to Piaget, the stage in which children develop object permanence is:

Kohlberg's highest stage of moral development is characterized by:

Which of the following behaviors in early childhood would MOST strongly indicate a need for developmental screening for Intellectual and Developmental Disabilities (IDD)?