Concept:Lev Vygotsky’s socio-cultural theory holds that social interaction and guided assistance are key to how children learn.Explanation:Vygotsky disagreed with views that learning is just absorbing knowledge or a passive response to rewards. He proposed the Zone of Proximal Development (ZPD). ZPD is the gap between what a child can do alone and what they can do with help from a more skilled person. This shows that knowledge is not simply passed from teacher to student. Instead, it is co-constructed through collaboration and support. Only option D matches this idea: knowledge is built in the zone where a child can work both independently and with others’ help.Answer:Option D is correct.