Concept:Lev Vygotsky’s sociocultural theory states that language is a key tool for thinking and learning, deeply linked to cognitive development.
Explanation:Vygotsky believed language is not just for communication but also for mediating thought.
Children use language to interact with knowledgeable others and understand new concepts.
He argued social factors like language and culture influence both language and cognitive growth together.
Therefore, language development helps cognitive development by enabling problem-solving and concept learning.
Option A is wrong because social factors affect both language and cognition.
Option B is wrong because cognition is influenced by language, not the other way.
Option C is wrong because they are interdependent, not independent.
Answer:D. Language development facilitates cognitive development.