In the context of Lev Vygotsky's sociocultural theory of development, while closely analyzing the concepts of 'Zone of Proximal Development (ZPD)' and 'Scaffolding', which of the following statements most accurately defines the role of a teacher and the true nature of the learning process?

In Lev Vygotsky's sociocultural theory of development, the 'Zone of Proximal Development' (ZPD) is the difference between the actual developmental level (determined independently) and the potential developmental level (achieved under the guidance or collaboration of a More Knowledgeable Other, or MKO). 'Scaffolding' is a temporary structural support coined by Bruner and deeply connected to Vygotsky's theory, provided by a teacher or more skilled peer according to the learner's ability, and gradually removed as the student's proficiency increases.