Answer:
b. private speech
Explanation:
Private speech is self-talk for communication, self-guidance and self-regulation of behavior. It can be observed that children between the ages of two and seven participate in private conversation. Although it is vocal, it is not intended for, or intended for, others. The private speech was first studied by Lev Vygotsky and Jean Piaget. Private speech usually occurs in children between the ages of two and seven. It is for to develop early literacy skills and to help improve the child's task performance, success and achievement.