Final answer:
Lev Vygotsky is the individual who believed that concepts are like "pegs" from which words are "hung" highlighting the significant influence of social and cultural factors on language development and contrasting with Noam Chomsky's innatist perspective.
Step-by-step explanation:
The individual who believed that concepts become the "pegs" from which words are "hung" is Lev Vygotsky. vygotsky, a Russian psychologist proposed a sociocultural theory of development where language and thought are fundamentally influenced by social and cultural factors. His perspective contrasts with Noam Chomsky's idea of an innate language acquisition device. Chomsky was an American linguist who initiated the cognitive revolution and was critical of behaviorism.
He emphasized that the mechanisms underlying language acquisition are biologically determined, separate from Vygotsky's emphasis on sociocultural factors. However, it is Vygotsky's sociocultural theory that aligns with the notion of language being shaped and supported by the framework of our cultural and social interactions, with concepts serving as the foundational "pegs" that support the acquisition and use of linguistic "words".