Lev Vygotsky proposed the needs of a child in learning as:?ZPD (zone of proximal development)ScaffoldingMKO (more knowledgeable others)? Scaffolding:?Temporary help is given to a child in learning by their peers, family members, teachers, etc.That's why option (4) is correct.reinforcement:?The theory of Reinforcement is proposed by B.F. Skinner.?Conditioning and Modelling are irrelevant to the question.Additional Information ZPD (zone of proximal development)The difference between the learning of child by self and the learning of a child with the help of others(society, culture, etc.)MKO (more knowledgeable others)-In this process only Hint is giving to the child by others to learn.