Concept:Vygotsky’s sociocultural theory says learning is deeply influenced by social interactions and culture.Explanation:Vygotsky believed that social interaction with knowledgeable people helps children learn better.He introduced the Zone of Proximal Development (ZPD) — the gap between what a child can do alone and what they can do with guidance.This shows that learning happens through collaboration, not in isolation.Thus, learning is fundamentally a social activity.Answer:A. is a social activity.