From the perspective of Lev Vygotsky's Socio-Cultural Theory, when a child solves a cognitive problem within their 'Zone of Proximal Development' (ZPD) with the support of a More Knowledgeable Other (MKO), which of the following statements is most appropriate and scientifically true regarding the interrelationship of 'cultural tools', 'scaffolding', and 'private speech' in this process?

According to Lev Vygotsky's socio-cultural theory of development, development occurs through social interaction, culture, and language. The child first communicates at a social level, which they gradually internalize as 'private speech' to control and regulate their own behavior and thinking. Within the 'Zone of Proximal Development' (ZPD), the temporary assistance or 'scaffolding' provided by the MKO bridges the gap between the child's independent ability and their potential ability.