Concept:Vygotsky’s socio‑cultural theory holds that language is a cultural tool that drives cognitive development.Explanation:Vygotsky argued that social interaction is the foundation of learning. Language is the main medium for this interaction. Children use language to communicate with more knowledgeable others (parents, teachers, peers). Through guided conversation, children internalize new concepts and strategies. This process builds higher‑order thinking. Language does not hinder or work independently of cognition; rather, it actively shapes and advances cognitive abilities. Without language, social learning and internalization of knowledge would be limited.Answer:B. facilitates cognitive development