Explanation: 1. Justification for Option 1: - The "Input Hypothesis," proposed by linguist Stephen Krashen, is a fundamental concept in second language acquisition theory. It posits that language acquisition occurs when learners are exposed to language input that is slightly above their current level of proficiency, often referred to as "i+1." This means that learners acquire language most effectively when they understand the essence of what is being communicated, even…Read More