Answer:
Learners need to be exposed to what Krashen calls 'comprehensible input' – that is, exposure to interesting and understandable listening and reading material. In Krashen's view, we acquire languages when we understand messages. In general linguists maintain that a first language is acquired, i.e. that knowledge is stored unconsciously, and that a second language is learned, i.e. that knowledge is gained by conscious study of the second language's structure.
Explanation:
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