What approach involves the use of external environmental factors in language learning?

The Social Interactionist Theory is correct because it emphasizes the importance of social interactions and external environmental factors in the process of language learning. This approach posits that language acquisition occurs through social interactions with more knowledgeable others, such as caregivers or peers. These interactions help children learn the rules of language and promote linguistic development in a meaningful context.

In contrast, Cognitive Theory focuses on the mental processes involved in learning rather than the external factors. Nativist Approach suggests that language ability is innate and primarily driven by biological factors, minimizing the role of the environment. Behavioral Theory emphasizes reinforcement and punishment in learning, which does involve some aspects of the environment but does not prioritize it in the same way as the Social Interactionist Theory. Thus, the Social Interactionist Theory uniquely incorporates the role of external environmental factors in language development.