Option 1 is the correct answer: "To aid thought and for self-regulation." 1. Explanation for Option 1: Lev Vygotsky, a prominent developmental psychologist, proposed that children's self-directed speech, often referred to as "private speech," plays a crucial role in cognitive development. According to Vygotsky, children use private speech as a tool to aid their thinking processes and to regulate their behavior. This self-talk helps them plan actions, solve problems, and…Read More