Before a child can display empathy and altruistic behaviors, the child needs to have cognition. piagetian intelligent social empathic

The answer would be social cognition. It is because social cognition is where a person process things in his or her mind and applies the things that he or she process or knows in situations. With this, if the child has social cognition, then the child could acquire the characteristics being said above in which this are things she or he would feel in terms of situations that will make the child feel that way.