Which hypothesis suggests that there is a distinction between language acquisition and language learning?

The Acquisition/Learning Hypothesis posits that there are two distinct processes involved in developing language skills: acquisition and learning. Acquisition refers to the subconscious process through which individuals naturally pick up a language, often in a naturalistic context, similar to how children learn their first language. This process is characterized by intuition and experience rather than formal instruction. In contrast, learning is a more conscious process that involves understanding specific rules of a language and typically occurs in an instructional setting. This hypothesis highlights the importance of both processes but emphasizes that true fluency and native-like language use are more likely achieved through natural acquisition rather than formal learning. The other hypotheses mentioned focus on different aspects of language development; for example, they may address cognitive processes, natural progression of language structures, or emotional factors affecting language learning, but they do not specifically delineate between acquisition and learning as this hypothesis does.